INDEX. 



Accessory germ, 189. 



— nuclei (centres of ossification). 



599, 640, 6i3. 



— thyroid gland, 318, 320. 

 Acervulus cerebri, 436. 

 Aeroblast, 180. 

 After-birth — see Placenta. 

 After-brain, 421. 



— vesicle, 422, 427. 

 Air-cells of lung, 323. 

 Air-chamber of Hen's egg, 18, 219. 

 Albumen of Hen's egg, 17. 

 Alecithal eggs, 12. 

 Alimentary tube, 281. 

 Allantoic circulation, 552. 

 Allantois of Mammals, of Man, 228, 



245, 270, 398. 



— of Eeptiles and Birds, 217-19. 

 Amnion of Mammals, 227. 



— of Man, 244, 250. 



— of Eeptiles and Birds, 207, 219. 

 Amniota, 238. ■ 



Amniotic fluid of Man, 251, 271. 



— folds, 207-9. . 



— sheath of the umbilical cord, 252. 

 Ampulla of semicircular canals, 495. 

 Anal membrane, 291. 



— pit, 291. 

 Anamnia, 238. 



Animal cells of the germ, 60. 



— pole of the egg, 11. 

 Animaloulists. 24. 

 Ankle-bones, 641. 

 Antrum of Highmore, 518. 

 Anus, fundament of, 290, 400. 

 Anvil — see Incus. 



Aorta caudahs 576. 



— double, 576. 



— permanent, 565, 576. 



— primitive, 295, 549. 

 Aortic arch, right-sided, 576. 



— arches, 286, 571, 573. 

 Appendix vermiformis, 301. 

 Aqueduotus Sylvii, 425, 431. 



Arbor vitse, 427. 



Archenteron, 85, 95, 170 — see also 



Coelenteron. 

 Archiblast, 189. 

 Archiblastio tissue, 189. 

 Arcuate fissure, 443 — see also Fissura 



hippocampi. 

 Area embryonalis, 102. 



— opaca, 99, 177. 



— pellucida, 99, 178. 



— vasculosa, 185. 



— vitellina, 185. 

 Areola mammse, 531. 

 Arteria oarotis, 572. 



— centralis retinae, 475, 481. 



— hyaloidea, 475. 



— iliaoa, 576. 



— omphalomesenterica, 270, 549. 



— perforans stapedia, 614. 



— pulmonalis, 573. 



— sacralis media, 576. 



— spermatica, 386, 390. 



— subclavia, 572. 



— umbilicalis, 260, 270, 552, 576. 

 ■ — vertebralis, 572. 



Arterial system, 570. t r , J- 

 Articular cartilage, 643., (, , «' "-'^m 

 Articulare, 625. 

 Articulation of jaw, primary, 624. 



— secondary, 646, 626. 

 Atlas, 603. 



Atresia pupillse congenita, 474. 

 Atrial partition, 558. 

 Atrioventricular valve, 555, 559, 561. 

 Atrium burss omentaKs, 300, 331. 



— of heart, 554. 

 Auditory organ, 490, 



— ossicles, 508, 619. 



— pit, 491. 



— ridge, 492. 



— spot, 492. 



— sac 1 J /Invertebrates, 492. 



— vesicle / \Vertebrates, 491. 

 Auricle (external ear), 509. 



■ — • (of heart), 555. 

 Auricular canal Cof heart), 555. 



