522 



Bulletin American Museum of Natural History. [\^ol. XXVII, 



Proterotherium, 379. 



Protocetus, 418-419. 



Protocone, origin, 184, function, 183, in 

 Jurassic Trituberculates, 183. 



Protodonta, 163, 464. 



Protogonodon, 402. 



Protolophid, origin, 187. 



Prototheria, taxonomic history, 225; 

 diagnosis, 230. 



Protypotherium, 376-378. 



Pterygoids, 424; of Cynodonts, 118, 120, 

 121, 159; of Monotremes, 150; of 

 Insectivores, 244. 



Pterygoid fossae, 424; of Rodents, 330. 



Ptilocercus, 269; skull, 272; do. fig- 

 ured, 273; origin of molar pattern, 290. 



Ptilodus, 169. 



Protungulata, 383 (South American); 

 465; characters, 359; origin and 

 distribution, 410; classification, 466. 



Pyrotherium, 380-382; carpus, 448. 



Pyrotherium Beds, 380. 



Quadrate, fate of the, 135; Gadow's 

 theory, 128; q. of Cynodonts, 139; 

 of reptiles in general, 131. 



Radius, primitive position, 433. 



Ray, 17; general place in mammalogy, 

 103. 



Rectigrade limbs: Patriofelis, 313; 

 Pyrotherium, 381. 



Renaissance Epoch, 13; general influ- 

 ence on mammalogy, 103. 



Reproductive system, 76. 



Respiration, mode of in Cynodonts, 159. 



Rhynchocyon, 279, carpus, 445. 



Ricardolydekkeria, 383. 



Rodentia Vicq d'Azyr, 324, 465; natur- 

 alness of the order, 325; origin of 

 molar pattern, 325; relations to 

 Insectivora, 330 ; primitive characters, 

 331; carpus, 445; relations to Cseneu- 

 theria, 460. 



Rosores Storr, 48. 



Ruminantia, 18, 466. 



RUtimeyer, 88. 



Saint Hilaire, sef Geoffroy. 



Scales in mammals, 145, 146. 



Scaloposaurus, 116. 



Scapula, evolution of, 433; of Cyno- 

 donts, 119; Monotremes, 152, 155; 

 Marsupials, 157. 



Schizotherium, 398. 



Schlosser, 89. 



Scholastic Epoch, 12. 



Scholasticism, inflvience on mammalogy, 

 103. 



Sciuromorpha Brandt, 330. 



Scopoli, 36. 



Scott, 87, 88. 



Septo-maxillary, 150, 155. 



Shoulder girdle, see scapula. 



Simplicidentata, 465. 



Sirenia, 406; genetic relations, 407; 

 carpus, 452; grouped with "Ongulo- 

 grades," 78; with Proboscidea, 82. 



Skull, elements of mammalian, 423-430; 

 s. of ancestral Placentals, 423. 



Solenodon, molar figured, 238; osteology, 

 241-255; manus and pes figured, 250; 

 humerus figured, 437; skeleton con- 

 trasted with Tupaia, 278. 



Soricida^, 263, 265. 



Soricomorpha, 465. 



Spalacotherium, 173. 



Sparassodonta, 203, 207, 295; supposed 

 relations with Creodonts, 303. 



Specific differentia, 18, 27. 



Species, as conceived by Ray, 17. 



Squamata Flower, 334. 



Squamosal, 425. 



Stapes, morphology, 130. 



Stereognathus, 163. 



Storr, 46. 



Subungulata lUiger, 70. 



Superorder, use of the, 463. 



Supraoccipital, 425. 



Sustenance, as a criterion of relationship, 

 32, 35. 



Swainson, 73. 



Synthetic types, 107. 



Synapsid Reptiles, 114. 



Syndactyla, 208. 



T^NiODONTA Cope, 99, 341 (Ganodonta), 

 465. 



