506 



INDEX. 



Organs, circulatory, 90. 



of hearing, 81. 



renal, 105. 



reproductive. See Eeproduc- 



tive organs. 

 respiratory, 101. See also 



Respiration. 



of sight, 79. 



of taste, 86. 



of touch, 86. 



of voice, 103. 



Omithodelphia, characteristics of, 



320. 

 Omithoscelida, 261. 

 transitional character of 



skeleton of, 261. 

 Os irinominatum of man, 37. 

 Ossa innominata of the horse, 351. 

 Ossification of facial apparatus, 25. 



skull, 21. 



vertebrje, 13. 



Ostrich, reproductive organs of, 



318. 



skull, 284. 



Otarid« (eared-seals), 423. 

 Ox, skeleton of, 377. 



P. 



Pal^otheeiDjK, 365. 

 Palate of cetacea, 395. 

 Pectoral arch, 34. 



in birds, 289.' 



chelonia, 206. 



crocodiles, 256. 



and fore limb of pike, 158. 



of plesiosaiiria, 213. 



Pectoral flns, 40. 



member of monkfish {squa- 



tina), 39. 

 Pelvic arch, 37. 



of chelonia, 206. 



of plesiosauria, 214. 



Pelvis of anthropomorpha, 480. 



bat, 455. 



birds, 293. 



cetacea, 394. 



crocodiles, 257. 



C5momorpha, 471. 



hedgehog, 444. 



man, 490 ; lower races of 



man, 495. 



Pelvis of platyrrhini, 466. 



porpoise, 405. 



pterosauria, 269. 



sirenia, 389. 



Permian formation, lizards of, 226. 



Perissodactyla, 342. 



Pharyngobranchii, 116. 



Phocidfe, general characteristics 

 of, 424. 



Phocodontia, 411. 



Phytophaga, 330. 



Pig, anatomy of, 367. 



brain, 64-69. 



digital muscles, 56. 



Pike, braiQ of, 164. 



fins, 42. 



pectoral arch and fore limb, 



158. 



skull, 151, 152, 154, 155. 



Pianipedia, characteristics of, 423. 



groups, 423. 



Pisces. See Fishes. 



" Placoid exoskeleton," 126. 



Plaice, skull of, 29. 



Plastron of the chelonia, 201. 



Platyrrhini, general characteristics 

 of, 465. 



Plesiosauria, 208, 215. 



pelvic arch of, 214. 



skeleton, 210. 



extinct, confined to Mesozoic 



rocks, 215. 



Pleuronectidfe (flat fishes), 30. 



Polypterus,caudal extremity of,17. 



Porpoise, general characteristics 

 of, 402. 



heart, 407. 



muscles, 406. 



pelvis, 405. 



respiratory apparatus, 408. 



skull, 403. 



stomach, 407. 



teeth, 407. 



vertebrse, 403. 



Post-Triassic group of plesio- 

 sauria, 215. 



Poupart's ligament, 38. 



Primates, characteristics of, 457. 



divisions of, 458. 



Proboscidea, general character- 

 istics of, 428. 



bones, 430. 



fossil, 432, 



