482 



INDEX. 



Optic lobes, chick, 121 



Optic nerves, chick, 133, 146 



Optic cup, 134 



Optic ohiasma, chiek, 147 ; mam- 

 malia, 372 



Optic thalami of mammalia, 373 



Orbitosphenoid, 246 



Orhitosphenoidal region, ohiok, 

 240 



Organ of Corti, mammalia, 395 



Organ of Jaoobson, mammalia, 



399 



Orycteropus, placenta of, 358 



Osmio acid, how to use, 427 



Osseous labyrinth, chick, 158 



Otic vesicle, ohiok, 157 



Outer layer, of blastodermic vesi- 

 cle, 314 



Ova, primordial, of chick, 221 



Ovarian follicle : of hen, 12 — 15 ; 

 mammal, 309 



Ovarian ovum : of hen, 11 — 15 ; 

 of mammals, 309 



Ovary: of adult hen, 11 ; of 

 chick, 222 ; of mammals, 

 309 ; f oUioIes of, 309 ; corpus 

 luteum of, 311 



Oviduct of adult hen, 15 ; of 

 chick, 224 



Oviparous animals, 308 



Ovum : of birds and mammals 

 compared, 307 ; of maromal — 

 in follicle, 309 ; membranes of, 

 310; maturation and impreg- 

 nation of, 310 — 312 ; polar 

 bodies of, 311; segmentation 

 of, 312 — 314; blastopore of 

 (Beneden), 314 



Palate, mammalia, 420, 421 

 Palatine bones, chick, 246 

 Pancreas : of chick, 181 ; mam- 

 malia, 419 

 Pander, nucleus of, 7. 

 Parachordals, ohiok, 235 — 238 

 Paraffin, 432 — 434 

 Parepididymis of cook, 224 

 Parietal bones of chick, 246 



Parieto-oocipital fissure of cere- 

 brum of man and apes, 385 



Pabkee on the fowl's skull, 245 



Paroophoron of hen, 224 



Peoten, chick, 147 



Pectoral girdle, chick, 234; mam- 

 malia, 405 



Pelvic girdle, chick, 234; mam- 

 malia, 405 



Penis, mammalia, 417 



Pericardial cavity, chick, develop- 

 ment of, 264 — 269 ; of rabbit, 

 331 ; mammalia, 406 



Perilymph, mammalia, 396 



Periotio capsules, chick, 237 



Peritoneal covering of heart of 

 chick, 88; cavity, mammalia, 

 406 



Peritoneum, mammalia, 419 — 420 



Pflugeb, egg tubes, 222 



Phalanges, chick, 234 



Pharynx, mammaha, 418 



Picric acid, how to use, 425 



Pioro-carmine, to make and use, 



431 

 Pig, placenta, histology of, 360 

 Pineal glands, chick, 1 1 7 — 1 19 ; 



of mammalia and birds, 373 — 



376 



Pituitary body : chick, 119 — 121; 

 rabbit, 334 ; of birds, 372 ; 

 mammaUa, 372, 420 



Pituitary space, chick, 240 



Placenta : 342 ; dlscoidal, deci- 

 duate, type of, 353, 354; meta- 

 discoidal, type of, 354—358 ; 

 decidua of, 356 ; chorion Iseve 

 of, 356 — 358; chorion frondo- 

 sum of, 356 — 358 ; comparison 

 of, 358 ; zonary type of, 358 ; 

 difiuse form, 359 ; polycotyle- 

 donary form, 369 ; histology of, 

 359—363; evolution of, 364; 

 of sloth, 360. 



Pleural cavity, chick, development 

 of, 264 — 269 ; mammalia, 406 



Pleuroperitoneal space of chick, 

 28 — 33, 84; formation of, 40, 

 41, 68 



Pneumogastrio nerve (see Tenth 

 nerve) 



