INDEX 



461 



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



gastro-hepatic ligament, 335 

 gastrula, 16, 17, 19-20: 65, 99 ff., 



98, 102, 104, 105: 249, 252, 257 



ff.; 385; rotation of, 98, 104, 



105 ff., 105 



gastrular cleavage (groove), 9P, 100. 



gastrulation, 15 ff., 16, 17: 99 ff., 98, 

 102, 106, 111 ff.: 248 ff., 249, 

 251, 259; - - comparisons, Am- 

 phioxus, 113 ff.; - - frog, 

 111/.;- - chick, 259 



genital, folds, 415, 416, 417; - 

 ridge, 415; - - ridge (sex-cell), 

 204, 204, 205; - - swelling, 415, 

 416, 417; - - tubercle, 415, 416, 

 417 



genitalia, external, 414 ff. 



germ, cells, 4, 5, 6 : 65, 68 ff., 70, 81, 



85 : 232 ff., 233 : 372 ff., 373, 383 ; 



- formation of, 64, 71 ff., 



199, 205: 361, 362, 363: 375, 



disc, see blastoderm; 

 layers, 15 ff., 16, 21, 24 ff.: 98 ff., 



99, 102, 107 ff., 110, 111 ff.: 247, 

 248 ff., 249, 252, 254, 254, 260, 

 264, 272, 280: 385, 385, 390, 391, 

 392, 395 ff.,_ 396, 397, 398, 399; 



- layers, inversion of, 389, 391 ; 

 see also ectoderm, endoderm, meso- 

 derm; - - ring, 16, 18, 24: 94, 

 95, 96, 101, 112; - - wall, 247, 

 247, 248, 254, 256, 258, 264, 272 



germinal, cells (nervous), 134: 308; 



- epithelium, 361, 362 

 gestation, duration of, 369 



gill, clefts (slits), 32, 35, 35, 39 ff., 

 40, 41, 42, 55 : 160 : 283, 286 : 404 ff., 

 404 ; - - first, 35, 40 ; - 



- primary, 32, 35, 39/., 40, 42 ; 



- secondary, 39 ff., 40 ; 

 tertiary, 41, 55; 



- vestiges of, 162, 163, 164: 

 330, 331 ; - - filaments, 162 ; - 



plate, 65, 122; 



pouches, 41: 



122, 158, 160, 160, 163, 164: 269, 



278, 328 ff., 329 ; - - rakers, 180 

 gills, external and internal, 65, 161, 



180, 181 



gizzard, 335, 336 

 gland, carotid, 163, 163, 182, 184, 



184; club-shaped, 25, 32, 



34, 35, 40, 43 ; - - uterine, 443, 



445 



glans clitoridis, 415; penis, 



~ 415, 416, 417 

 glia cells, 134: 308 

 globular process, 413, 413 

 glomerulus, 182, 184, 196-197, 196, 



198, 199, 200 

 glottis, 165, 166: 332 



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



gonad, 6, 55 ff., 57 : 71-73, 72, 203 

 ff., 204, 205: 335, 361 ff., 362. 

 See also ovary, testis. 



gonadial cavities, 56, 57, 58 



gonoccel, 7, 56, 57 



gonoducts, see ducts, reproductive. 



gono-nephrostome, 56 



Goodrich, 53 



Graafian follicle, 375, 376 



Graf von Spee's Embryo Gle, 400, 401 



granulosa cells,71 : 237, 239 : 375, 376 



gravitational plane, 86 



gravity, as a factor in determining 

 symmetry, 86 ff. 



gray crescent, 85, 85 



groove, branchial, 65, 122; - 

 enteroccelic, 110, 110, 114; - 

 epipharyngeal, 44; - hyper- 



branchial, 44; - - interventricu- 

 lar, 338 ; - - intestinal, 281, 281 ; 



-laryngo-tracheal, 332; 



medullary (neural), 65, 111, 117, 



120: 263, 269: 401; of Hat- 



schek, 35, 40, 45, 46; - -olfac- 

 tory, 154; pleural, 310, 351; 



-primitive, 119,120: 252,252, 

 253, 254, 263, 268: 395, 396, 398, 

 401 



Grosser, 424, 440 



guinea-pig, amnionic cavity, 389, 

 424; gestation, 369; implantation, 

 421; notochordal canal, 397; ovum 

 373; trophoblast, 389 



gut, 25, 29, 33 ff.: 122, 158 ff.: 326 j?.: 

 402 ff.; - - diverticula, anterior, 

 25, 32-33, 32, 35 ; - - postanal, 

 170: 280, 296, 296, 334; 

 preoral, 262, 304, 328, 329 



Guyer, 377 



Hsemotrophe, 441 



Halicore, placentation, 440 



Hall, 198 



Harrison, 156 



hatching, 26: 66: 299-300 



Hatschek's groove, 35, 40, 45, 46; 

 - nephridium, 35, 42, 45, 46 



head, cavity, 25, 32, 33; - - fold, 



252, 260, 260, 261, 262, 263, 278, 



281; - - fold, of amnion, 262, 



292: 425, 427; - - kidney, 193; 



- process, 252, 253, 259: 395 



heart, 118, 125, 166, 174 ff., 175, 176, 

 182: 262, 266, 273 ff., 276, 278, 

 286, 291, 304, 337 ff., 338, 342, 

 351: 402 ff.; - - commencement 

 of beating, 339; - - lymph, 189, 

 191: 349-350 



heat, effect upon symmetry, 88; see 

 also oestrus. 



