INDEX 



(Pages 161 refer to Amphioxus: 62-228 to the frog: 229-367 to the 

 chick: 3GS-454 to the Mammal. Page numbers in heavy-face type refer to 

 illustrations. 



Accessory cleavage furrows, 244, 246 



Achoria, 438, 439, 440 



adolescence, 370 



adrenal bodies, 206-207, 207: 363- 

 364 



after-birth, 450 



age, frog, estimation of, 64, 127-128; 

 of human embryos, 403, 407 



air, chamber, 233, 234; - - sacs, 

 332 336 



albumen, 233, 234, 241, 288, 289; 



' formation, 241; later 



history, 298 ff.; sac, 288, 



289, 298 ff. 



alimentary canal, 33: 158 ff.: 269, 

 326 #., 335 



allantois, 280, 287, 288, 289, 291, 295 

 ff., 296, 297, 335: 400, 402, 428, 

 430, 431, 434 ff.; - - at hatching, 

 300; - blood vessels of, 299: 



435, 436; functions of, 295: 



434; fusions of, 297-298; 



- human, 400, 430, 435-436, 

 444; - - later history, 430, 431, 

 434 ff.; - - mammalian com- 

 pared with avian, 435; - rela- 

 tion with chorion, 430, 431, 435; 



stalk of, 287, 288, 289, 296, 



297, 297, 348: 430, 431 



Allen, 205 



amnio-cardiac vesicles, 252, 263, 

 266, 267, 268. 272, 273 



amnion, 280, 287, 288, 289, 292 ff., 

 296, 310, 351: 444, 445; 

 cavity, 280, 287, 288, 289, 293, 

 294: 385, 386, 388, 389, 390, 390, 

 391, 391, 392, 393, 399, 400, 424, 

 444, 445 ; - - cavity, false, 389, 



391, 391; cavity, formation 



in man, 428 ff., 430; folds, 



262, 283, 292 ff.: 391, 392, 393, 

 396, 425, 426 ff., 426, 427; - 

 folds, closure of, 293, 296, 297: 



425, 426, 427; folds, head, 



262, 292: 425, 427; later 



history, 424 ff., 428, 430 



Amphioxus, outline of life-history, 3 



amplexus, 78 



ampullae, 150, 151 : 322, 323 



anal, membrane, 414, 415; 



opening, 415, 415 ; - plate, 



280, 296, 296, 297, 334 

 annulus tympanicus, 214, 217 

 anterior, chamber (eye), 317, 321; 



- gut diverticula, 25, 32-33, 

 32, 35; intestinal portal, 

 261, 262, 266, 269, 272, 276, 278, 



282, 291, 304, 345 



anus, 35: 118, 169: 296: 415, 415 

 aorta, dorsal, 179, 182, 184, 184: 

 273, 275, 276, 278, 281, 291, 294, 

 329, 341, 342, 342, 348: 405; 



lateral dorsal, 179, 180, 182 : 

 272, 291, 292, 341; - - ventral, 

 177:273, 275, 278, 282 



aortic arches, 180, 181, 181, 184: 



283, 285, 291, 329, 338, 340 ff., 

 341, 342, 348: 405, 405; - 

 carotid, 184, 184: 283, 341, 342; 



- hyoid, 179, 183: 340, 341; 



- mandibular, 179, 183: 275, 

 278; - - pulmo-cutaneous, 184, 

 184; - pulmonary, 184: 342, 

 342; - systemic, 184, 184: 

 341, 342 



aperture, auriculo-ventricular, 338; 



sinu- auricular, 337; 

 urinogenital, 415$"., 415 



Aplacentalia, 438, 440 

 appendicular skeleton, 221-222 

 aqueduct of Sylvius, 132: 307 

 arch, see aortic; - branchial, 120, 

 123, 160, 163, 164: 330: 404, 404, 

 406, 407, 408; hyoid, 65, 

 122, 160, 160: 330; - man- 

 dibular, 122, 160, 160, 163, 164, 

 216: 283, 285, 304, 330; 

 pectoral, 221; - pelvic, 221; 



- visceral, 120, 123, 160, 160, 

 163, 164 : 286, 328 ff.; 404 ff., 404, 

 406, 408; -visceral, cartilagi- 

 nous, 211, 216 ff., 217, 218 



archenteron, 15 ff., 16, 21: 98, 101, 

 102, 106:250 



455 



