INDEX 



469 



(Amphioxus, pages 1-61; frog, 62-228; 



skull, 164, 210, ff.: 354; bony 



elements of, 215; cartilag- 

 inous, 210 ff. 



solenocytes, 45, 53 



somatic stalk, 282 



somatopleure, 174: 266-267, 280 



somites, 21, 25, 26, 29 ff., 30, 32, 51 

 f.: 124, 170 #., 171: 264 ff., 



66, 268, 274, 278: 352 ff.: 401, 



402 ff.; number of, 51: 172: 



264, 352; of head, 264-265; 



table of, 173 



space, perivitelline, 4, 5, 9, 10: 80, 

 81 : 374 



spawning, 8, 58: 64, 71, 77 jf. 



spermatogenesis, 77 



spermatogonia, 7 



spermatozoon, 5: 70, 71; lon- 

 gevity of,379; supernumerary, 



246 



spermophile, implantation, 422, 423 



spinal, bulb, 129: 308; cord, 37: 



117, 118, 134, 134: 308; - 

 ganglia, 135, 142, 143: 309, 311; 

 - nerves, 135, 142-143, 143, 



173: 311 jr., 312; nerves, 



axons of, 311 



spiracle, 67, 161:315, 330 



splanchnic stalk, 282, 289, 327, 334 



splanchnoccel, 25, 31, 52 : 124,124, 170 



splanchnopleure, 174: 266-267, 280 



spleen, 191: 350 



stalk, allantoic, 287, 288, 289, 296, 



297, 297, 348: 430, 431; 



body (belly), 399, 400, 429, 430, 



446; optic, 129, 144, 145, 147, 



148, 160: 303, 316, 317, 318, 320; 



somatic, 282 ; splanchnic, 



282, 289, 327, 334 



stapes, 325 



sternum, 221 



stigma, follicular, 378 



stomach, 168, 169: 332, 335, 351 



stomach-intestine, 33 



stomodseum, 158, 164, 166 : 269, 327, 

 329 : 404, 412, 412 



Strahl, 439 



stratum granulosum, 375, 376 



streak, primitive, 119, 120: 251 ff., 

 252, 254, 258, 260, 274: 394, 395, 



396, 398, 401; relation 



to embryo, 256 JT., 258, 260 



stroma, ovarian, 205: 361, 362 



subatrial ridges, 48, 48 



subgerminal cavity, 245, 246, 248 



subnotochordal rod, 169, 204 



subzonal layer, 382, 383, 385, 385 



sucker, oral, 65, 66, 120, 164, 180 



supra-orbital folds, 413, 414 



suprapericardial body, 163, 164 



chick, 229-367; mammal, 368-454.) 



suprascapula, 221 



suspensory fold, 49 



suture, cerebral, 274, 276 



swelling, genital, 415, 416, 417 



Sylvius, aqueduct of, 132: 307 



symmetry, of blastula, 96; of 



ovum, 4, 6, 10, 11, 17: 70, 80, 83 

 #., 87, 88 ff. 



sympathetic, cords, 143, 143: 312- 



313, 313; ganglia 144: 207, 



207: 364; nervous system, 



143-144, 143:312-313,313 



synccelom, 32 



syncytia, trophodermal, 422 ff. 



syncytiotrophoblast, 390, 422 ff., 

 423 



syncytiotrophoderm, 422 JT., 423 



synencephalon, 304 



systemic arch, 184, 184: 341, 342 



Tadpole, 63 ff.; - metamor- 

 phosis of, 67-68 



tail, 65, 120, 120: 404, 406, 406, 408, 



408, 409, 409 ; bud, 279, 280, 



283, 296, 296, 297 ; fold, 280, 



293, 296, 296, 297 ff., 297 



Talpa, see mole. 



tapir, placentation, 440 



Tarsius, amnion folds, 428; embry- 



. onic shield, 387; placentation, 440; 

 yolk-sac, 433 



teeth, 220; vestiges, 328 



"teeth" (horny), 159, 166 



telencephalon, 129, 133: 283, 303 jf., 

 304 



temperature, of incubation, 231 



tentacles, velar, 44, 45 



terminal sinus, see sinus. 



testis, 6: 72, 73, 77: 362 



thalami, optic, 129, 148: 307, 320 



thoracic duct, 191: 349 



thymus, 162,163:330,331 



thyroid body, 163, 165, 166 : 304, 331, 



tongue, 165: 332; bar, 41, 42 



torus transversus, 129, 131, 133 : 305 

 trabeculse, 210, 211, 212, 213 

 trabecular cornu, 210, 211, 212, 215 

 trachea, 329 

 "Trager," 389, 391, 429 

 transverse process, 209 

 trophoblast, 382, 384, 385 ff., 385, 



386, 388, 390, 421, 423 ; knob, 



389 

 trophoderm, 397, 422, 447; 



functions of, 422-423; - - syn- 



cytium, 422 ff.; vasculari- 



zation of, 423 

 truncus arteriosus, 177, 178, 184, 185: 



282,338,339 



