606 



INDEX 



Organismal concept, 434 



Organisms, 16, 429, 434 



Organization, 16, 20, 22, 23, 27, 164 



Organogeny, 120, 121, 450 



Organs, 102-104, 120, 121, 158-161, 164, 435, 436 



Organs of Corti, 331 



Oriental region, 506, 506 



Origin, muscle, 443 



Orioles, 403 



Ornithology, 5 



Orntthomimus, 398 



OrnithoThynchus anatinus, 412 



Orthogenesis, 522 



Orthoptera, 283 



Osborn, H. F., 26, 27 



Oscuia, 128-130 



Osmosis, 12 



Osmotic pressure, 12 



Osphradium, 213 



Ossicles, 193, 203, 332 

 (See also Ear, 410) 



Ostia, 128-130, 144, 146 



Ostracoda, 262 



Ostracoderms, 514 



Ostriches, 396, 403, 404, 506 

 foot, 400 



Otocyst, 312 



Otter, 413 



Outer chamber, eye, 332, 333 



Outer ear, 330, 331-332, 380, 409 



Ovary, 135, 140, 160, 161, 166-168, 176, 235, 297, 



317, 325, 430, 432, 442, 465 

 Oviduct, 160, 161, 167, 235, 297, 317, 325 

 Oviparity, 106 

 Oviposition, 280 

 Ovipositor, 272 

 Ovum, 29, 107 

 Owen, 553 

 Owls, 401 



burrowing, 509 

 Ox, foot bones, 415 



musk, 509 

 Oxidases, 452 



Oxidations in body, 38, 452, 457 

 Oxygen, 18, 430, 452, 463 



cycle, 460 

 Oxyhemoglobin, 231, 324, 463 

 Oyster drill, 225 

 Oysters, 221, 226 



P generation, 531, 532, 535 

 Paddle plates, 154, 544 

 Pain, 445, 473, 474 



receptors, 328 



spots, 445 

 Paired characters, 528 

 Paired units, 529 

 Falaeoniastodon, 524 

 Palate, 329 



hard, 408 



soft, 322, 408 

 Palatine bone, 386 

 Palearctic region, 505-507 

 Paleontology, 510 



Paleozoic era, 511, 513, 514 



Paleozoology, 5, 510-515, 520 



Pallial line, 209, 210 



Pallium, 210 



P;ilolo. 249 



Palpi, insects, 272, 273 



Palps, 210, 212, 242, 243 



Pancreas, 97, 98, 317, 323, 339, 431, 464 



Paper nautilus, 224 



Paralysis, 537 



Paramecium, 69-77, 83 



Paramecium aurelia, 77 



Paramecium caudatum., 69, 70, 76, 77 



Parapodia. 242, 243, 248, 545 



Parasites, 170, 174, 478, 496 



(See also Human parasites, and individual types) 



Parasitism, 166, 167, 170-174, 357, 496-49S 



Parasitology, 5 



Parathyroids, 464, 465 



Parazoa, 128 

 Parelephaa, 524 



Parenchyma, 158 



Parental generation (see P generation) 



Parker, G. H., 329 



Parotoid gland, 366 



Parrakeets, 405 



Parrots, 405 



Parthenogenesis, 105, 263, 285, 443, 539 



artificial, 112-113 

 Parthenogonidia, 86 

 Partial cleavage, 117, 118 

 Partial pressures, law, 463 

 Pasteur, 26, 83, 554, 555 

 Pasteurization, 554 

 Patella, 319, 391 

 Patella, eyespot, 223 



trochophore, 226 

 Pathogenic protozoans, 87 

 Pathology, 5 



Pavement epithelium, 96, 97 

 Pea fowls, 402, 405 

 Pear leaf blister mite, 302 

 Pearl button industry, 226 

 Pearl essence, 358 

 Pearls, 228, 358 

 Pearly nautilus, 224 

 Peas, Mendel's work, 533 

 Peat bog fossils, 510 

 Pebrine, S3, 554 

 Pecten, 395 

 Pectine, 300 

 Pectoral arch, 361 



Pectoral fias, 316, 338, 346, 348, 361 

 Pectoral girdle, 320, 423 

 Pedal ganglion, 210, 213 

 Pedicellariae, 192, 193, 197, 203 

 Pedipalpus, 296, 297, 300 

 Pedogenesis, 106, 172, 374 

 Peduncle, 190, 296, 544 

 Pelagic fauna, 483 

 Pelecypoda, 217, 221, 513 

 Pelican, beak, 399 

 Pellicle, 69, 70, 436 

 Pelvic fins, 316, 338, 345, 346, 348 

 Pelvic girdle, 320, 344, 350 



