688 



INDEX. 



Osmerus, 576 

 Osphradium, 354 

 Ossicle, auditory. 127 

 Ostariophysi, 575 

 Osteoblasts, 88 

 Ostracoda, 422 

 Ostracodermi, 557, 578 

 Ostracoteuthis, 388 

 OstraeidfE, 367 

 Ostium tubse, 552 

 Ostrich, 613 

 Otaria, 64S 

 Otic ganglion, 537 

 Otica, 521 

 Otis, 615 

 Otocysts, 236 

 Otoliths, 127 

 Otter, 647 

 Ovibos, 642 

 Ovicells, 322 

 Ovidse, 642 

 Oviducts, 120 

 Oviparous, 161 

 Ovis, 642 

 Ovoid gland, 331 

 Ovoviviparous, 161 

 Owen, 18 

 Owlet moths, 495 

 Owls, 617 

 Ox warble, 493 

 Oxy-hcemoglobin, 89 

 Oxyrhyncha, 437 

 Oxystomata, 437 

 Oxyuris, 301 

 Oyster crab, 437 

 Oysters, 367 



Pachydermata, 641 

 Pachydrilus, 315 

 Pachylemuridce, 649 

 Paddle fish, 573 

 Piedogenesis, 142, 472 

 Paguridea, 436 

 Palcearctic region, 176, 178 

 P;Uceinon, 400, 434 

 Paliemonetcs, 434 

 PaUenionidte, 434 

 Fakuocrinoiilca, 342 



Palseotherium, 643 

 Palaeozoic era, 180 

 Palate, 539 

 Palatine bone, 525 

 Paleacrita, 494 

 Palechinoidea, 345 

 Paleontology, 4 

 Paleozoology, 4 

 Pali, 256 

 Palinurida:, 435 

 Palinurus, 436 

 Pallial line, 359 

 Pallial sinus, 360 

 Pallium, 351, 534 

 Palmate foot, 614, 615 

 Palm crab, 436 

 Palolo, 311 

 Palpi, labial, 362 

 Palpus, 430, 463 

 Paludicella 324 

 Paludinidae, 380 

 Pancreas, 106 

 Pandalus, 434, 435 

 Pandion, 617 

 Pandionidae, 617 

 Pangolin, 636 

 Panopeus, 437 

 Panorpa, 483 

 Panorpidae, 483 

 Pintopoda, 456 

 Paper nautilus, 395 

 Papilio, 496 

 Parachordals, 520 

 Paractinopoda, 349 

 Paradidymis, 552 

 Paradisea, 50 

 Paradiseidae, 616 

 Paradoxides, 415 

 Paragldssa, 464 

 Paragnath, 430 

 Paramcecium, 206, 207, 209 

 Paranuclein, 66 

 Paranucleus, 206 

 Parapodium, 312, 369 

 Parapophysis, 518 

 Parapterium, 604 

 Paraquadrate bone, 581 

 Parasita, 422 



