INDEX 



585 



Clemmys, amnion, 466, 468 



Cloaca, 192 



Cochlea, 129 



Coelome, 59, 197 



Collecting tubes, renal, 247, 256, 257 



Commissure — 



anterior, 87 



posterior, 89 



superior, 89 

 Connective tissue, 291 

 Cornea, 139 

 Cortex, 91 

 Crocodilia — 



blood-vessels, 401 



carotid arteries, 404 



heart, 391 



neonychia, 75 



tooth-succession, 329 

 Crossopterygii (Polypterus) — 



segmentation, 19 

 Cryptobfranclius — 



ciliation of external gills, 156 

 Cuticle, 70 

 Cyclostomata — 



genital pores, 246 



horny teeth, 77, 78 



olfactory organ, 128 



pancreas, 189 



Delamination, 34 

 Demersal, 20 

 Dentine, 322. 325 

 Dermis, 69 



Diaphragm of Birds, 164 

 Diplospondyly, 341 

 Dipnoi (Lung-fish) — 



practical hints, 565 

 Disc, germinal, 4 

 Dorsal lip of blastopore, 32 

 Dorsal sac, 89 

 Ductus venosus, 539 



Ectoderm, 30 

 name, 505 



Egg- 

 envelopes, 455, 515 



size, 2 



tooth, 326 

 Elasmobranchii (Sharks, Skates, etc. )— 



aortic arches, 398 



archinephric duct, 240 



arcualia, 295 



blastoderms, 560 



brain, 92, 93 



chondrocranium, 312 



chromophile organs, 284 



external gills, physiological replace- 

 ment of, 157 



fin rudiments, 445 



gastrulation, 45 



gill-filaments, 160 



heart, 366, 373, 374 



interrenals, 283 



lens, 138, 139 



Elasmobranchii (continued) — 



limb-skeleton, 351 



liver, 187 



mesoderm of head, 208 



motor nerve-trunk, 111 



Miillerian ducts, 243, 244 



muscle-buds, 207 



neural crest, 122 



opisthonepbros, 247, 248 



origin of mesoderm, 63 



otocyst, 132 



ovary, 276 



pancreas, 189 



peritoneal funnels, 251 



pharyngeal clefts, 158 



practical hints, 559 



pronephros, 236, 237 



segmentation, 12, 14, 15, 29 



sympathetic, 124 



urinogenital sinus, 242 



vasa efferentia, 279 



venous system, 413 



viviparity, 478 

 Electrical organs, 212 

 Embryonic development, 464 

 Enamel, 322, 325 

 Endoderm, 30 



name, 505 



secondary, 49 

 Endolymphatic duct, 130, 132 

 End-plate, motor, 204 

 Enteron, 58, 144, 146 



development of openings, 193 



muscular sheath, 217 



temporary occlusion, 192 

 Epidermis, 70 

 Equatorial, 5 

 Eye, 133, 134, 136 



evolutionary origin, 141 



muscles, 210 



Face, 555 

 Feathers, 71, 72 

 Fin-rays, 346 

 Fins, median, 439 

 skeleton, 346 

 paired, 441 



skeleton, 349, 353 

 Flask -glands, 79 

 Foregut, 144 



solid, 148, 521 

 Fowl, common — 



blood-vessels, 550 

 early blastoderms, 519 

 egg, 514, 515 

 embryos — 

 first day, 522 

 second day, 524-532 

 third day, 532-546 

 fourth day, 546-549 

 fifth day, 548-551 

 sixth day, 551, 552 

 seventh day, 553, 554 

 sagittal sections, 525, 543 



