688 



INDEX. 



Osmerus, 576 

 Osphradium, 354 

 Ossicle, auditory, 127 

 Ostariophysi, 575 

 Osteoblasts, 88 

 Ostracoda, 422 

 Ostracodermi, 557, 578 

 Ostracoteuthis, 388 

 Ostraeidae, 367 

 Ostium tubae, 552 

 Ostrich, 613 

 Otaria, 648 

 Otic ganglion, 537 

 Otica, 521 

 Otis. 615 

 Otocysts, 236 

 Otoliths, 127 

 Otter, 647 

 Ovibos, 642 

 Ovicells, 322 

 Ovidae, 642 

 Oviducts, 120 

 Oviparous, 161 

 Ovis, 642 

 Ovoid gland, 331 

 Ovoviviparous, 161 

 Owen, 18 

 Owlet moths, 495 

 Owls. 617 

 Ox warble. 493 

 Oxy haemoglobin, 89 

 Oxyrhyncha, 437 

 Oxystomata, 437 

 Oxyuris, 301 

 Oyster crab, 437 

 Oysters, 367 



Pachydermata, 641 

 Pachydrilus, 315 

 Pachylemuridae, 649 

 Paddle fish, 573 

 Psedogenesis, 142, 472 

 Paguridea, 436 

 Palaearctic region, 176, 178 

 Palaemon, 400. 434 

 Palsemonetes, 434 

 Palaemonidae, 434 

 Palseocrinoidea, 342 



Palaeotherium, 643 

 Palaeozoic era, 180 

 Palate, 539 

 Palatine bone, 525 

 Paleacrita, 494 

 Palechinoidea, 345 

 Paleontology, 4 

 Paleozoology, 4 

 Pali, 256 

 Palinuridae, 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 

 Paludinidse, 380 

 Pancreas. 1 06 

 Pandalus, 434, 435 

 Pandion, 617 

 Pandionidae, 617 

 Pangolin, 636 

 Panopeus, 437 

 Panorpa, 483 

 Panorpidae, 483 

 Pantopoda, 456 

 Paper nautilus, 395 

 Papilio, 496 

 Parachordals, 520 

 Paractinopoda, 349 

 Paradidymis. 552 

 Paradisea, 50 

 Paradiseidae, 616 

 Paradoxides, 415 

 Paraglossa, 464 

 Paragnath, 430 

 Paramaecium, 206, 207, 209 

 Paranuclein, 66 

 Paranucleus, 206 

 Parapodium, 312, 369 

 Parapophysis, 518 

 Parapterium, 604 

 Paraquadrate bone, 581 

 Parasita, 422 



