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[...] of inquiry to which our author adverts, and as he suggests that it might not be very difficult to rear young spiders from the egg and place them in conditions favourable for their existence, it is to be hoped that he will try the experiment and help to throw light on a subject on which we have so [...]
[...] animals to which men belong. At the outset of his existence, man, like every other animal organism, is only an egg, a simple little cell, whose diameter is only one-fourth of a millimetre at the most. It differs from the primordial cellule of the other mammalia only [...]
[...] differs from the primordial cellule of the other mammalia only in its chemical constitution and the molecular composition of the albuminous matter of which the egg essentially consists. And yet these differences cannot be directly perceived by any means at our disposal; but we are compelled by indirect conclusions [...]
[...] at our disposal; but we are compelled by indirect conclusions to suppose their existence as the prime cause of the difference in individuals. The human egg encloses all the essential elements of a simple organic cellule: a protoplasm which bears the name of viteſ/us, and a nucleus or germinal vesicle. This nucleus is a [...]
[...] small sphere itself enclosing another nucleus much smaller still, the nucleolus ; exteriorly the protoplasm is enveloped by a mem. brane which is known by the name of zona fellucida. The eggs of many of the lower animals, as the greater part of the medusae, are on the contrary naked cells, which do not possess this [...]
[...] are on the contrary naked cells, which do not possess this envelope. As soon as the egg of the mammal is completely developed, it leaves the ovary and descends, by the narrow canal of the oviduct, into the uterus, where, after fecundation, it becomes an [...]
[...] jeºs which Mr. Spencer calls secondary, aggregates. . If Mr. Spencer's hypothesis was correct, we should expect to find at least some Annelid developing its segments in the egg as * series of buds. It is not, of course, here meant to be concluded that Annelids are not sometimes, in a condition of tertiary [...]
[...] recruiting in France was received.—M. Guerin sent a note on silkworm disease; he finds that both healthy and unhealthy moths lay sound eggs. Feb. 24.—M. de Quatrefages, president, in the chair.—M. Pasteur read a note on M. Cornalia's report on silkworm cultiva [...]
[...] Pasteur read a note on M. Cornalia's report on silkworm cultiva tion. M. Pasteur believes that his system of preserving the healthy eggs will produce good results.--M. Dumas reported on Mr. Fayrer's book on Indian poison snakes.—M. J. Raulin pre sented a paper on the silkworm disease, and M. Hugo a note on [...]
[...] original observation. In noticing the reproduction of the Actiniae the authors remark that the eggs which hang on to the inner edge of the partitions of the visceral cavity drop off into it during different stages of development. Ordinarily they are [...]
[...] The parasitic early life of Campaneſ/a Aachydºrma A. Ag. appears to throw a doubt whether thisacaleph passes through the hydroid state or not. Should the eggs de velop at once into the medusa in this instance, there is no small significance to be attached to the fact. An anomaly [...]
[...] amphora Ag. This campanularian develops medusae which never separate from the parent hydroid, but wither on its stem after having laid their eggs. The development of these abortive medusae is not far advanced. This species flourishes in the sewage of Boston. There is a very [...]
[...] the enclosure, occasionally venturing up to the cobra, ap parently quite unconcerned. Some eggs being laid on the ground, it rolled them near the cobra, and began to suck them. Occasionally it left the eggs, and went up to the cobra, within an inch of its [...]
[...] ceive their nerves from the supraoesophagealganglion; that, accord ing to Dr. Packard, the young Limillus passes through a Nauplius: stage while in the egg; that no argument, could be founded upon the lower lip, the condition of which varied extremely in the three groups proposed to be removed from the Crustacea ; [...]
[...] generating H2 S for laboratory use, to employ galena, zinc, and dilute hydrochloric acid.—Captain Hutton described the micro scopic structure of the egg-shell of the moa, and showed that it was altogether different from the kiwi egg. September 16.-Mr. W. T. L. Travers described the tradi [...]
[...] depth of two feet, leg bones, ribs, vertebrae, a pelvis, toe bones, tracheal rings, and pieces of skin and muscle were found. On the third floor were found fragments of egg-shell, and the bones of a bird with a keeled sternum. In Dr. Thomson's col lection there are sixteen tibiae, so that he obtained remains of at [...]
[...] statement is made by Mr. Williams, of Hayle, in his paper on “Scientific Nursing.” “I have (he says) in my possession a double chick, the produce of an egg laid by a barn-door fowl, one half being the natural species, the other half composed of the sparrow-hawk | " Until this [...]
[...] and an elaborate work on the development of the Nema tods, in which the important questions of the significa tion of the parts of the egg are discussed, was com pleted by him. In the collections of miscellaneous observations, always finely illustrated, which he from time [...]
[...] anatomical observations) is one among those relating to the Annelids of the Bay of Naples. Claparède found that the AVereis /01//terilii lays eggs, sexually fertilised, which, on hatching, produce a worm which had been placed in quite a distinct genus (//eſ, roſtereis), and this worm lays [...]
[...] on hatching, produce a worm which had been placed in quite a distinct genus (//eſ, roſtereis), and this worm lays similar true eggs, which produce sometimes a second kind of //e/croncreis, or at other seasons the original form Aſercis Dumez'i'.'; again. The difference between He/cro [...]
[...] a difficulty in accepting the view of their originating in fluid vesicles, though he was unable to suggest any other theory by which to account for them. He observed that the eggs from the Stone-field slate closely resemble those of birds, and that it was of the highest interest to find such eggs in strata containing so [...]
[...] of the highest interest to find such eggs in strata containing so many remains of ornithosaurian forms, such as Ahamphorhynchus and Perodactylus, of which genus probably these were the eggs. Prof. Rupert Jones fully recognised the ingenious explanation of the bubble-formed limited slickensides, that looked so much like [...]
[...] due to gaseous origin. He remarked on the rarity of Ptero dactylian remains as compared with those of other Saurians in the Wealden beds, in which the presumed eggs of Pterodactyls were found. Mr. Seeley did not regard the Wealden egg as being that of a Pterodactyle. . . Mr. Carruthers, in reply, re [...]
[...] THE discussion raised by Prof. Newton on the coloration of cuckoos' eggs has been very interesting doubtless to many readers [...]
[...] of NATURE; a mite of information from New Zealand, concern ing one species of the Cuculidae, may not be out of place. The German theory that “the egg of the cuckoo is approxi mately coloured and marked like those of the birds in whose nest it is deposited, that it may be less easily recognised by the [...]
[...] small cuckoo. The dupe is the piripiri, or gray warbler, Guygone ſlavizentris, Gray, its eggs are white, dotted with red spots; the egg of the whistler of much larger size, is of a greenish dun. However, I think it should be stated that the nest of the dupe [...]
[...] is somewhat of a pear-shaped structure, firmly and thickly built, with a small entrance near the middle, well sheltered with feathers. Here discrimination betwixt eggs may be difficult for the foster parent, if it possesses the faculty and uses it. In the Trans. N. Z. Institute (vol. ii. pp. 58 and 65) reasons have been [...]
[...] Mason Ant on the Isle of May, by James M'Bain, M.D. Dr. M“Bain visited the Isle of May on Feb. 16, and obtained speci mens of the ants, with eggs, larvae, and attendant aphides. The ants since then had been kept in glass vessels, and one of the artificial Formicarias was exhibited to the Royal Physical Society. [...]
[...] Quartrefages. The author stated, as the result of his researches, that u der the influence of fecundation the germinal disc of the egg in osseous fishes divides into two layers, of which the upper one becomes segmented, whilst the lower one forms an interme diate layer between the segmented blastoderm and the vitelline [...]
[...] when individually examined their colours, of course, differ. All these ſeed on mice, small reptiles, and grasshoppers and locusts. They likewise greedily devour birds' eggs. Equally common with these in some parts, but especially noticed by me near Cradock, is the Xerus setosus Gray, or ground squirrel. It [...]
[...] Islands, where it is a serious hindrance to the men em" ployed in collecting the eggs of the Murre (Uria Brunnichii which breeds there in countless numbers. The traffic in their eggs between these islands and San Francisco alone [...]
[...] their eggs between these islands and San Francisco alone reaches annually the sum of between one and two thousand dellars. The egg-hunters meet at one o'clock every day during the season (from May to July) with the exception of Sundays and Thursdays, and at a given signal, so that [...]
[...] The affrighted Murres have scarcely risen from their nests, before the gull, with remarkable instinct, flying but a few paces ahead of the hunter, alights on the ground, tapping such eggs as the short time will allow before the egger comes up with him. The broken eggs are passed by the men, who remove only those [...]
[...] exploits, procures a plentiful supply of its favourite food. Dr. Heermann says that he once saw thiee gulls scientifically ap proach a single Murre sitting on her egg. Two of them ſeign ing an attack in front, the Murre raised herself to repel them ; instantly the third advancing from the rear seized her solitary [...]
[...] ing an attack in front, the Murre raised herself to repel them ; instantly the third advancing from the rear seized her solitary egg from beneath her, and flew off with the booty, the two first immediately following to claim their share. The egg was dropped and broke on the rocks, when a general scramble [...]
[...] Whilst the reviewer is also not ingenuous enough to confess that I should in all probability be thoroughly familiar with the appear ance of Free Nematoids and their eggs, he, without the least hesi tation, again suggests an explanation whose only warrant seems to exist in the supposed necessity for upsetting my statements. I can [...]
[...] The cocoon or nest of the katipo is perfectly spherical in shape, opaque, yellowish white, and composed of a silky web of very fine texture. The eggs are of the size of mustard seed, perfectly round, and of a transparent purplish red. They are agglutinated together in the form [...]
[...] soul above cabbages, and rarely condescends even to sip or suck the daintiest nectar from flowers. After a longer or shorter ex istence, it begins to lay eggs, and places them in the immediate [...]
[...] the tubular ante-chamber, traverses the tunnel, and reaches one of the chambers. Here she deposits her insensible victim, and lays one egg close to it. Returning again to the field, she seizes another larva, stings it, and carries it off to deposit it close to the first. This procedure is repeated as many as thirty times, and [...]
[...] first. This procedure is repeated as many as thirty times, and the chamber becomes full of insensible weevil larvae and one Odynerus egg. The other chambers are filled in the same man ner, and an egg is laid in each. Then the wasp comes out of the tunnel for the last time, breaks down the tubular ante-chamber [...]
[...] The egg is soon hatched in each chamber, and a small, legless, and extremely delicate larva crawls forth, and seizes upon the victim close to it. So tender is the larva that the least roughness of the [...]
[...] of these, excepting the head, is a point, which usually marks an opening where air tubes or tracheae enter the body to ramiſy over the whole of the internal structures. When within the egg, and before it was perfectly formed, the head of the larva consisted of at least four separate pieces, but these united and coalesced in [...]
[...] duce and lead bloodthirsty lives also. It is important to recog nise the distinction already hinted at. The growth of the young embryo larva within the egg, and that of the escaped and skin shedding larva, is progressive, but the descriptions given of the changes in the shape and in the anatomy of the digestive organs [...]
[...] all the tadpole stages of metamorphosis while still in the egg. All these stages have been observed by M. Bavay; and whoever is familiar with the evolution of the ordinary tadpole before it [...]
[...] All these stages have been observed by M. Bavay; and whoever is familiar with the evolution of the ordinary tadpole before it quits the egg, will see that M. Bavay has observed only a modi fied form of the well-known process. The Guadeloupe frog is born as a frog, not as a tadpole; and this, paradoxical as it may [...]
[...] the destructive influence of the boiling fluid. This latter asser tion was emphatically denied by Spallanzani—his denial being based upon a most extensive series of experiments with eggs in great variety and with seeds of all degrees of hardness. These were all ſound to be killed by a very short contact with boiling [...]
[...] water. Spallanzani had thoroughly satisfied himself that even very thick-coated seeds could not resist this destructive agent, whilst he thought that the idea entertained by some, of the eggs of the lowest infusoria being protected from the injurious in fluence of the boiling water by reason of their extreme minute [...]
[...] serious consideration. Such a notion was, he thought, wholly opposed to what was known concerning the transmission of heat. Whilst, therefore, the opinion of those who believe that eggs have the power of resisting the destructive influence of boiling water could be wholly refuted, Spallanzani thought it by no [...]
[...] means followed that the infusoria, which always aſter a very short time appeared in boiling infusions, had arisen independ ently of the existence of eggs. The infusions being freely ex [...]
[...] posed to the air, it was very possible that this air had intro duced eggs into the fluids, which by their development had given birth to the infusoria. § After the lapse of a century it has at last been clearly shown [...]
[...] controversies which had been carried on both here and abroad concerning the Origin of Life, were prepared to admit, as Spal lanzani had done, that the eggs or germs of such organisms as appear in infusions were unable to survive when the infusions containing them were raised to the temperature at which water [...]
[...] of the experiments in 1853 up to the present time, will not be equal to the operations of one season on the Upper Sacramento; in 1875 the salmon eggs collected numbered II,000,000, making a bulk of eighty bushels, and weighing nearly ten tons ! These eggs, so carefully packed that [...]
[...] these numbers can now be taken. Enormous quantities of go, are in complete accordance with those I have obtained from shad have been bred from the egg and sent into the a similar comparison of some of the rainfalls in Bengal. [...]
[...] from the Atlantic Ocean. It is thought probable that the four specimens did not ultimately live, but as two of the four were big with spawn it is probable the eggs would come to maturity, as the death of the parent does not kill the spawn. Lobster eggs, unlike fish ova, are fructified [...]
[...] Prof. MacAlister reſerred to recent important advances in embryology. Among researches respecting the early fºrmation and primary developmental changes in the egg, he alluded to those of E. van Beneden, Bütschli, Ihering, and Oscar Hertwig, classified under three heads. (1) What is the method whereby [...]
[...] those of E. van Beneden, Bütschli, Ihering, and Oscar Hertwig, classified under three heads. (1) What is the method whereby the stimulus to development directly operates on the egg : (2) What becomes of the germinal vesicle ; and (3) In what manner and from what source the directive corpuscles arise, and what [...]
[...] function do they serve in the animal economy. The next subject dealt with was the history of the primitive groove of the ſertilised egg, as discovered by Dursy, Schäfer, Balfour, and Rauber. Prof. MacAlister could not but believe that a change had taken place in the position of the embryo on the surface of the germinal [...]
[...] Zoological Society, Nov. 17. –Mr. George Busk, F.R.S., in the chair.—The Secretary exhibited on behalf of the Rev. J. S. Whitmee an egg of Pareudiastes facificus, and an accompanying egg of the Samoan Porphyrio. — A communication was read from Sºr Victor Brooke, Bart, containing some remarks on the identity [...]
[...] Sºr Victor Brooke, Bart, containing some remarks on the identity of a certain deer in the Society's collection, which had been determined as Cºrvus savannarum.—A series of eggs of Mega podes (Megapodius) transmitted by Mr. John Brazier, was exhi bited. These had been obtained from different islands of the [...]
[...] bited. These had been obtained from different islands of the Solomon group.–Mr. R. B. Sharpe also exhibited some Mega podes' eggs from the southern part of New Guinea.—Prof. Mivart read a paper on the axial skeleton of the Struthionidae, and pointed out that judging, by the characters of the axial skeleton, [...]
[...] called Halmaturus apicalis.-Mr. P. L. Sclater read a notice of some specimens of the Black Wolf of Thibet, now or lately living in the Society's menagerie.—Mr. H. E. Dresser exhib ted eggs of the various European species of Hypolais, together with those of Acrocephalus streperus and A. palustris, and pointed out that [...]
[...] of Acrocephalus streperus and A. palustris, and pointed out that these two groups (Hypolais and Acrocephalus) approach each other in their eggs as well as in other characters, the two nearest allied in each group being Hypolais rama and Acrocephalus fa/ustris.-Mr. W. T. Blanford read a notice of two new Uro [...]
[...] Limacodes asc//us, Mola albulaſis, and Perophorus rhododactylus. —Mr. Jenner Weir exhibited specimens of Mamfis religiosa, with some egg-cases taken by himself at Meran, in Tyrol. Mr. McLachlan exhibited a printer's block (such as is used for printing posters), attacked by a species of Anobium, and he was [...]
[...] did not preserve that species from parasites, as he had often bred a species of Pºomachus from the nests, and he believed, in those cases, the eggs were attacked before the mud coating was added.—Mr. Champion exhibited some rare species of British Coleoptera, viz., Apion A'yei, Abdera triguttata, Zymery/on [...]
[...] about Pigeons and Doves,” throw considerable light on the absurd mode of practice adopted by the native doctors. From the latter paper we learn that the eggs of pigeons are an antidote to the injurious effects of boils and smallpox. Some persons may think the remedy [...]
[...] and smallpox. Some persons may think the remedy worse than the disease, as the following course has to be followed :—Two eggs must be hermetically sealed in a bamboo tube and placed in the middle of a cesspool for half a moon. The whites are then to be mixed with [...]
[...] Lizard. The larger lizards, especially the Uromastir ºpinifes, are called in Arabic /)habò, and the smaller //ardhun. The Bedawin say that the former lays seventy eggs and even more, resembling pigeons' eggs, and that the young are at first quite blind. They are believed to be very long lived, indeed I have [...]
[...] that these birds exist in such numbers in the territory of the 'Anazeh Bedawin that during the nesting season two men will go out with a camel's-hair bag between them and fill it with eggs in a very short space of time. The women then squeeze out the eggs and cook them, leaving the shells inside the bag. The [...]
[...] a very short space of time. The women then squeeze out the eggs and cook them, leaving the shells inside the bag. The Kata is said always to lay three eggs, neither more nor less. Its bones when properly prepared are said to be a cure for bald ness, and the head may ł. used as a charm to extort secrets from [...]
[...] * During the intense cold of December and January last, I found it t ok an exposure to the atmosphere of two days at a temperature of 12 C. before life appeared in solution of white of egg in the pure distilled water, whilst as the weather got warmer the time required became less. [...]
[...] that Mr. Calvert commenced a third series of experiments. On the 9th of February 1oo fluid grains of albumen from a new-laid egg were introduced as quickly as possible and with the greatest care, into ten ounces of pure distilled water contained in the flask in which it had been condensed, and an atmosphere [...]
