466 



INDEX 



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



organs, of lateral line, 141, 156, 167 



Ornithodelphia, ova, 418 



Ornithorhynchus, ova, 418 



ossicles, auditory, 324-325 



ostium (oviducal), 72, 73, 203: 236, 



236, 360: 371; during ovula- 



tion, 378 



otocyst, 140, 149, 160: 283, 285, 322, 

 322 



ovary, 6, 7, 56 ff., 67: 71, 72: 235, 



236, 363: 371, 372; follicular 



capsules of, 56, 67: 206: 235, 236, 

 238, 239: 373, 374, 376, 376, 378; 

 stroma of, 205: 361, 362 



overgrowth, margin of, 247, 249, 268, 

 277, 277 



oviduct, 72, 202, 203 : 235, 236, 360 

 ff .: 371, 372 



ovulation, 78: 240 ff.: 377-379; 



relation to coitus and parturition, 

 379 



ovum, 4, 6, 6, 10, 17: 66, 68 ff., 70: 

 232 ff., 233: 372 ff., 373, 376; 



at time of laying, 70: 232 ff., 



233; formation of, 236 ff.; 



human, 373, 373 ; lon- 

 gevity of, 379; number 



formed, 78; polarity of, 4, 5, 



6, 10, 11, 17: 69, 70, 83; 



production of, 236-237, 242; 



sizes, 373; symmetry, 4, 6, 



10, 11, 17:70, 80, 83 jf., 87, 88 #. 



"ovum," the mammalian blastoder- 

 mic vesicle and ovum, 399 



Owen, 439 



Pabulum, 441 



pancreas, 167, 167: 333, 336, 346 



pancreatic duct, 168 



Pander, nucleus of, 243, 247 



papillae, acustic, 323; feather 



286 



parachordse, 210 

 paradidymis, 362 

 paraphysis, 131 : 305, 306 

 parencephalpn, 304 

 parietal cavity, see exoccdom 

 paroophoron, 363 

 parovarium, 363 : 372, 375 

 pars basilaris, 160, 151 

 parturition, 450; relation to 



ovulation, 379 

 Patterson, 241, 248 



Pearl, 241; and Curtis, 241 



pecten, 320 



pectoral and pelvic arches, 221 



penetration path, 79, 80, 81, 84 



penis, 415, 416, 417 



Perameles, embryonic membranes, 



419, 420; placentation, 419, 439 



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



periblast, 243; central, 245, 246 ; 



marginal, 244, 245, 246, 277; 



nucleation, 246-247 



pericardial cavity, 166, 174, 176, 180, 

 192: 262, 267, 275, 310, 350 ff., 

 351 



pericardio-peritoneal septum, 191- 

 192 



perigonadial cavity, 56 



perilymph, 152: 324 



perineum, 414 



peripharyngeal bands, 42, 43 



peripheral nervous system, 135 ff: 

 311 #. 



peritoneal cavity, 352 



perivitelline, membrane, 6, 9; 



space, 4, 5, 9, 10:80, 81:374 



Peters, 442 



phseochrome tissue, 206-207, 207 



phallus, 415 ff., 415 



pharynx, 33: 118, 159, 160: 262, 269, 

 272, 278,304, 328 #.,329 



Phascolarctos, placentation, 439 



pig, allantois, 436; amniqn, 392; 

 gestation, 369; implantation, 421; 

 lutein, 378; notochordal canal, 

 398; placentation, 439, 440 



pigeon, gastrulation, 248 ff.; oocyte, 

 239 ; nucleation of periblast, 246- 

 247 



pigment, of ovum, 66, 69, 80, 85, 85 ; 

 of blastula, 97 



pineal body, 130: 307 



pinna, 413, 414 



pit, auditory, 282, 283; ol- 

 factory, 38,38: 153, 164, 160: 325: 



407, 412, 412 ; preoral, 25, 32, 



33, 44 jf.; primitive, 262, 253, 



257, 260: 398 



pituitary body, 132: 327 



placenta, 391, 425, 430, 437 ff., 

 444, 445, 447, 448 #.,449; - 

 basal plate of, 449; classifica- 

 tion, 438 ff.; cotyledonary, 



439; discoid, 439; dis- 



coidalis, 440, 441 ff.; endo- 



thelipchorialis, 440; epithelio- 



chorialis, 440-441; hsemocho- 



rialis, 441 ff., 446; human, 441 



ff., 444, 445, 448 ff., 449 ; loculi 



of, 448; partial, 440; 



syndesmochorialis, 441; zo- 



naria, 440; zonary, 439; 



zono-discoidalis, 440 



Placentalia, 438, 439, 440; 



vera, 



440; embryonic mem- 

 branes of, 419 ff. 



placentation, defined, 437 



placode, 138, 139 : 310; auditory 



139, 149; facial, 139; 



