INDEX, 



Acanthias embryos 225, 259, 268, 275 

 Accessory Malpighian body, 256 

 Alimentary canal, 48, 50, 51, 54, 63 ; 

 stages B — G, 87 — 92 ; its primitive 

 constitution, 87; anus of Eusconi, 

 88; floor formed by yolk, 88; for- 

 mation of cellular floor, 89 ; com- 

 munication of neural and alimentary 

 canals, 91 : its discovery by Kowalev- 

 sky, 91 ; from stage K onwards, 217 

 —229 

 Alimentary diverticula, origin of me- 



soblast, 122 

 Amniotic vertebrates, yolk-sack circu- 

 lation, 237 

 Amcfiba, division of nuclei, 19 

 Amphibians ; embryos of, 28, 48, 51, 

 55, 56, 62, 84, 91, 141, 151, 189, 

 226, 231, 250, 258, 277 ; yolk-cells, 

 89 ; epiblast, 99, 100 ; muscular 

 system, 115 

 AmpMoxus, 46, 48, 81, 214, 215, 234 ; 

 segmentation cavity, 41,45; neural 

 and alimentary canals, 91 ; absence 

 of limbs, 104 ; mesoblast, 119 ; 

 spinal nerves of, 166, 193 

 Ampbiura, alimentary tract, 123, 125 

 Annelids, 170, 234 ; derivation of 

 mesoblast, 121 ; development of 

 nerves, 165 

 Anodon, division of nucleus in, 21 

 Anus, development of, 228 ; of Eus- 

 coni, 88 

 Argiope, mesoblast and body-cavity, 



123 

 Arnold, development of the eye, 188 

 Arteries, development of, 235 

 Ascidians, neural and alimentary ca- 

 nals, 91; origin of the notochord, 96 

 Asteracanthion, germinal vesicle of, 8 

 Asteroids, development of mesoblast, 



123 

 Asymmetry of the blastoderm, 66 

 Atrophy of germinal vesicle, 3, 8 

 Auditory nerves, development of, 198 

 Auditory organ, development of, 188 

 Auditory sac, 75, 78 



B. 



Auerbach, germinal vesicle, 9 ; seg- 

 mentation, 20 



Aves, neural and alimentary canals, 

 91 ; formation of heart, 231 



Avian blastoderm, 63 



Avian egg, 67 



Bambeke, Prof., segmentation cavity, 

 33 ; embryology of osseous fishes, 89, 

 90 ; muscular system of amphibians, 

 115 



Batrachian ovum, atrophy of the 

 germinal vesicle, 5 ; segmentation, 

 14, 27 ; segmentation cavity, 45 



Bergmeister, Dr, processus falciformis, 

 186 



Birds ; germinal vesicle, 4, 8 ; seg- 

 mentation, 27, 28 • position of em- 

 bryo in blastoderm, 92; segmental 

 duct, 125 ; development of nerves, 

 161 ; double formation of heart, 

 231 ; MiiUerian duct, 269, 270 



Bischoff, double formation of heart, 

 231, 232 



Blastoderm ; its external appearance, 

 10 ; sections of, 17 ; asjTumetry of 

 the segmented, 25 ; in osseous 

 fishes, 26; divisions into two layers, 

 33 ; formation of the layers, 34 ; 

 growth of, 42, 48, 50; nuclei of 

 cells, 38, 39, 40 ; sections of (Elas- 

 mobranch and Bombinator igneus), 

 58, 60, 61 ; volk enclosed by, 80 ; 

 of the Bii-d, 92 



Blastopore, 68, 81, 92 ; primitive 

 streak remnant of blastopore, 68 



Bombmator, 5, 59, 148, 225, 231 ; 

 germinal vesicle of, 5 ; sections of, 

 61 



Brachiopoda, derivation of mesoblast, 

 121, 122 ; development of, 123 



Brain, development of the, 174 — 183 ; 

 general history, 174; Fore-brain; — 

 optic vesicles, 176 ; infundibulum, 

 176 ; pineal gland, 177 ; olfactory 

 lobes, 178 ; lateral ventricles, 179 ; 



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