INDEX 



723 



Organogenesis, 80, 81, 85, 109 

 "Origin of Species," 609 

 Origin, ix, x 



muscle, 259 

 Ornithodelphia, 26 

 Ornithorhynchus, 27, 27, 41, 46, 53, 90, 



492 

 Os entoglossum (basihyal), 305 

 Os uteri, 425 

 Osborn, 187 

 Osculum, 5 

 Osmotic pressure, 44 

 Osphradia (or "false gills"), 573 

 Ossification, 103 



Osteoblast, 103, 104, 158, 195, 205 

 Osteoclast, 104, 158, 205 

 Ostium tubae, 421, 432, 441 

 Ostracoderm(ata)(i), 15, 23, 24, 31, 34, 



643, 652, 656, 657 

 Ostriches, 55 

 Otic bone, 599 



capsule, 483, 605 

 pit, 602 



vesicle, 602, 603 

 Otoconia, 600 

 Otolith, 595 

 Ovarian artery, 377 

 cavity, 45 

 ligament, 421, 424 

 vein, 396 

 Ovariotomize(d), 450 

 Ovary, 7, 8, 10, 18, 35, 36, 37, 54, loi, 



412, 420, 421, 441, 449 

 Oviducal gland, 45 

 Oviduct, 7, 44, 45, 51, 53, loi. ^°^> 4ii, 



412 

 Oviparity, 45, 55, 56, 57 

 Oviparous, 39, 45, 47, 51, 53, 55, 57 

 Ovoid, 64 



Ovulation, 450, 451 

 Ovum(a), 36, 38, 41, 42, 45, 412, 420, 421, 



421, 423 

 Owen, 217, 608, 609 

 Oxidation, 46, 328 



Oxygen, 46, 48, 51, 52, 53, 54, 160, 328 

 Oxytocin, 464 

 Oysters, 13 



Pacini, corpuscles of, 566, 568 

 Pads, digital, 169 



Pads, hypothenar, 169 

 interdigital-, 169 



thenar, 169 

 Pain, 563 



Paired appendages, ir, 23, 23, 31, 85 

 evolution of, 236 



eyes, 86, 623 



fins, 236, 237, 244, 353 

 Palate, 227, 344, 577 



soft, 306 

 Palatine bone, 235, 227, 232 



glands, 301 



nerve, 483, 484 



tonsil, 306 

 Palato-pterygo-quadrate, 229 

 Paleocortex, 4S9, 498 

 Paleontological, xiv 

 Paleontology, vii 

 Paleopallium, 502 

 Paleostoma, 296 

 Paleostracan, 651 



Paleostriatum, 489, 501, 502, 503, 504 

 Paleozoic, 34 



Pallium, 487, 489, 491, 498, 544 

 Palm, 168, 249 

 Palmaris brevis m., 283 



longus m., 282 

 Pancreas, 90, 99, 322, 326, 327, 416, 447 

 Pancreatic duct, 326 



islands, 447, 448 

 Pancreatico-duodenal artery, 392 

 Panniculus carnosus, 272 

 Papilla(e), 10, 19, 303 



basilar, 597 



circumvallate, 579, 579, 580 



filiform, 303, 304, 579 



fungiform, 303, 304, 579 



lingual, 580 



taste, 184, 579 



vallate, 303, 304 

 Papillary ducts, 435 



muscles, 373, 389 

 Paracasein, 311 

 Parachordal cartilage, 228 

 Paracone, 187 

 Paraconid, 188 



Paradidymis, 407, 412, 427, 441 

 Paramecium, 3 

 Paraphysis, 505 

 Parapithecus, 33 

 Parapodium(a), 11 

 Parapophysis, 204 



