1910.] 



Index. 



523 



Tail of mammals as retaining primitive 



characters, 146. 

 Taligrada Cope, 99, 35G, 357, 466; 



carpus, 447; astragalus, 456. 

 Talonid, origin, 190. 

 Talpida>, 263. 

 Tarsipes, 215. 

 Tarsals, factors determining evolution 



of, 111. 

 Tarsii, 465. 

 Tarsus, phylogenetic significance of, 110; 



t. of mammals, see astragalus. 

 Taxeopoda Cope, 98, 99, 351, 352. 

 Teeth, characters of, as criteria of 



classification, see Dentition. 

 Telmatherium, cheek teeth figured, 192; 



molar pattern figured, 188. 

 Testes: Tupaiidse, 271; Macroscelidida;, 



281. 

 Theosodon, 379; feet, 109. 

 Therapsida, 116, 464. 

 Theria, name and diagnosis, 230. 

 Therictoidea, 464. 

 Theriodesmus, 116; carpus, 439; do. 



figured, 440. 

 Theriodontia, 117. 

 Therocephaha, 116, 464. 

 Thylacoleo, 217. 

 Thylacynida>, 203; Patagonian Thy- 



lacynes, see Sparassodonts. 

 Thylacynus, skull figured, 122; humerus 



figured, 437. 

 Tillodontia Marsh, 100, 292; carpus, 445. 

 Tillotherium, 292-294. 

 Titanotherium, feet, 109. 

 Titanotheres, supposed Artiodactyl 



characters, 385. 

 Toxodontia Owen, 347; defined, 384. 

 Transitional forms, 45. 

 Trapezoid, possibly homologous with 



metacarpals, 442. 

 Tribolodon, 163; lower jaw figured, 137. 

 Triconodon, 173; dentition, 176. 

 Triconodonta, 170, 172, 464. 

 Trigonolestes, 403. 

 Trigonostylops, 376, 384. 

 Triisodon, 311; molar pattern figured, 



188. 

 Tritubercular molar, origin of, 181, 184. 



Trituherculata Osborn, 171, 172, 177; 



reJations to Insectivores, 196. 

 Trituberculy, theory of, 89, 184, 191. 

 Tritylodon, 166. 

 Troucssart, 87, 89. 



Tubulideutata (Huxley), 334, 336, 465. 

 Tylopoda lUiger, 70. 

 "Tympanic" of Cynodonts, 121. 

 Tympanic annulus, 128. 

 Tympanic cavity, origin, 125. 

 Tympanic membrane of Cynodonts, 122, 



127, 129. 

 Tympanic process of alisphenoid, 227. 

 Tympanic region, 426. 



Monotremes, 151, 155. 



Notoryctes, 257. 



Solenodon, 245-6. 



Chrysochloris, 257, 267. 



Myogale, 264. 



Ictops, 261 



Tupaiidte, 274. 



Creodonts, 302. 



Galeopithecus, 317. 



Primates, 321, 322. 



Rodentia, 329. 



Orycteropus, 335. 



Perissodactyla , 391. 

 Tupaia, 269; manus and pes (palmar 

 view) figured, 270; skeleton figured, 

 276; genetic relations, 279; teeth 

 figured, 276; origin of molar type, 

 290; ossicula auditus, 322; carpus, 

 445. 

 Typotheria Zittel, 369, 376, 384. 

 Tensor tympani muscle, 132. 



UlNTATHERIID.E, 358. 



Unguiculata: 18 (Ray), 30 (Linnaeus); 

 recognized as an unnatural assemblage, 

 351. 



Ungulata: 18 (Ray), 30 (Linnajus); tax- 

 onomic history, 342-353; characters 

 and relations of the different orders, 

 354-406; genetic relations (summary), 

 409; group recognized as composite, 

 409; regarded as a superorder, 466. 



"Ungulates," South American, 369. 



Unity of type, or organization, theory of, 

 72, 75. 



