Philosophical Transactions of the Royal Society of London, Volume 174,Deel 3W. Bowyer and J. Nichols for Lockyer Davis, printer to the Royal Society, 1884 |
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Pagina 728
... entoderm cells which is ruptured at the time of spawning , the eggs being thus discharged into the gastric cavity and thence passed out to the exterior . The eggs make their exit through the mouths of the sexual polyps , and the time ...
... entoderm cells which is ruptured at the time of spawning , the eggs being thus discharged into the gastric cavity and thence passed out to the exterior . The eggs make their exit through the mouths of the sexual polyps , and the time ...
Pagina 739
... entoderm . In the next change - which constitutes perhaps the most important epoch in the development of the larva - the ectoderm and entoderm are separated by a process of delamination ; i.e. , the inner end of each sphere separates as ...
... entoderm . In the next change - which constitutes perhaps the most important epoch in the development of the larva - the ectoderm and entoderm are separated by a process of delamination ; i.e. , the inner end of each sphere separates as ...
Pagina 740
... entoderm cells . Unluckily , the nuclei do not appear in the section , which is furthermore somewhat disfigured by shrinkage cavities . In a few cases I have observed at a much earlier period divisions of the nuclei , which may possibly ...
... entoderm cells . Unluckily , the nuclei do not appear in the section , which is furthermore somewhat disfigured by shrinkage cavities . In a few cases I have observed at a much earlier period divisions of the nuclei , which may possibly ...
Pagina 741
... entoderm cells , which differ little in structure from those of the ectoderm . § 3. General considerations and comparison with other forms . With the formation of the germ - layers the segmentation may be regarded as finished , and it ...
... entoderm cells , which differ little in structure from those of the ectoderm . § 3. General considerations and comparison with other forms . With the formation of the germ - layers the segmentation may be regarded as finished , and it ...
Pagina 744
... entoderm cells . Hence it appears that the cleavages do not reach the centre of the egg until the delamination takes place ; and in this case the cause seems pretty clearly to lie in the greater abundance of deutoplasm in the central ...
... entoderm cells . Hence it appears that the cleavages do not reach the centre of the egg until the delamination takes place ; and in this case the cause seems pretty clearly to lie in the greater abundance of deutoplasm in the central ...
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Veelvoorkomende woorden en zinsdelen
Alcyonaria appearance axial polyp axis basals become bilateral body buds calyx-teeth Carbonic acid carcass cavity cell-wall Chlor cilia citron band cleavage colony colour condenser connexion critical velocity deutoplasm diameter dorsal earth eddies embryo endosperm entire animal entoderm cells experiments fluid gauge granular HOFMANN's blue interradial iodine KÖLLIKER lamella larva larvæ lateral layer lime live-weight longitudinal MDCCCLXXXIII mesenterial mesenterial filaments methyl violet middle lamella nuclei observed oesophagus offal oxalate peduncular septum Pennatulacea phosphoric acid picric acid pigs pipes pit membrane plasmolysis Plate 70 portion potash precipitate protoplasm pulvinus Pure ash quantity radials radiant matter tube reagent Renilla Reteocrinus segmentation separated septa sexual polyps shown in fig side siphonoglyphe solution specimen spectrum spheres spicules stage stained stomodæum structure substance sulphate sulphuric acid supporting lamella temperature tentacles terbia tissue Trace Trace Trace Transverse section ventral chamber vitellus wall yttria yttrium Zinc Iod zooids