INDEX 



(Pages 1 61 refer to Amphioxus : 62-228 to the frog: 229-367 to the 

 chick: 368-454 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, 335 

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



formation, 241; later 



history, 298 ff.; 

 289, 298 ff. 



sac, 288, 



alimentary canal, 33: 158 ff.: 269, 

 326 ff., 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 



ammo-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 



ampulla, 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: 406; 



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 ff., 415 



Aplacentalia, 438, 440 

 appendicular skeleton, 221222 

 aqueduct of Sylvius, 132: 307 



arch, see aortic; branchial, 120, 



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



406, 407, 408; hyoid, 66, 



122, 160, 160: 330; man- 

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



216: 283, 286, 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 



