660 



B. 



Basal plate of the placenta uterlna, 



262. 

 Basilar plate, 606. 

 Bell's law, 460. 



Belly-stalk of human embryo, 245. 

 Between-brain, 425. 



— Tesicle, 422, 431. 

 Bile-duct, 329. 

 Blastoderm, 67. 



Blastodermic vesicle, 224 — see Blastula, 

 Blastopore, 85, 96, 104, 282. 

 Blastosphere, 68. 

 Blastospherio coelom, 204. 

 Blastula, 68, 100, 92, 90, 88, 224. 

 Blood, formation of, 170, 175. 

 Blood-circulation, single, 557. 



— double, 557, 586. 

 Blood-corpuscles, embryonic, 183. 

 Blood-islands, 179, 183, 551. 

 Blood-points, 183. 

 Blood-vessel system, 542. 

 Blood-vessels, formation of, 186, 175. 

 Body, form of the, 194. 



— of Amphiosus and Amphibia, 195. 



— of Fishes, Reptiles, and Birds, 197. 

 Body of vertebra, 598. 

 Bone-nuclei — see Centres of ossifica- 

 tion. 



Bony labyrinth, 502. 



— tissue, 541. 



Bowman's capsule of urinary tubules, 



364. 

 Box-within-box theory, 23. 

 Brain, 421. 

 Brain-fissure, anterior, 431. 



— posterior, 429. 

 Brain-plate, 457. 

 Brain-sand, 436. 

 Brain-vesicles, 421. 



— first, 439. 



— second, 431. 



— third, 430. 



— fourth, 429. 



— fifth, 427. 

 Branchial arches, 286, 609. 



— arteries, 286, 571. 



— clefts, 285. 



— furrows, 286. 



— leaflets, 287, 571. 

 , — veins, 287, 571. 

 Branchiomeres, 351. 

 Branchiomerism, 633. 

 Bursa omentalis, 300, 303. 



Calcar avis, 441. 

 Canalis auricularis, 556. 



Canalis hyaloideus, 475. 



— incisivus, 517. 



— neurentericus of Amphibia, 120. 



— neurentericus of Amphioxus, 110. 



— neurentericus of Birds, Eeptiles. 



etc., 126, 417. 



— neurentericus of Mammals, 129, 



282, 293. 



— reuniens, 497. 



— utriculo-saccularis, 497. 

 Cardiac endothelium, source of, 175, 



544. 

 Cardinal veins, 577. 

 Carpal bones, 641. 

 Cartilaginous tissue, 540. 

 Caruncula lacrymalis, 487. 

 Cauda equina, 421. 

 Caudal fold, 200. 



— gut, 292. 



— sheath, 209. 

 Cavum tympani, 507. 

 Cella media, 443. 

 Cell-budding, 31. 



Cell-patches (chorionic epithelium), 



261. 

 Central canal of the spinal cord, 419. 



— furrow of the cerebrum, 447. 



— lobe of hemispheres, 442. 

 Centres of ossification, 643, 599. 

 Centrolecithal eggs, 12. 

 Centrosomes, 53. 



Cephalic curvature, 284. 



— elevation, 202. 



— flexure, 423. 



— process — see Head-process. 



— see also Head. 

 Cerebellum, 430. 



— vesicle of, 422. 

 Cerebral mantle, 426. 



— vesicle, 422. 



— vesicles — see Brain-vesicles. 

 Cervical cavity, 546, 566. 



— fistula, 290. 



— ribs, 602. 



— sinus, 289. 



— vertebrse, 602. 

 Chalaza, 18. 

 Chief germ, 189. 

 Chorda dorsalis, 110, 593. 



— fundament of, 110, 117. 



— tympani, 508, 621. 

 Chordal canal, 132. 



— groove of Amphibia, 119. 



— groove of Amphioxus, 111. 



— groove of Birds, Selachians, Mam- 



mals, 180, 131. 



— sheath, 594. 



— sheath, skeletogenous, 595. 

 Choriocapillaris, 482. 

 Chorion, 9. 



