546 PRIMARY FACTORS OF ORGANIC EVOLUTION. 



Sponges, 80. 



Sports, influence of, 24 



Spy, 159. 161, 163, 164, 165, 166, 169, 

 170. 



Squamata, 114, 115, 116. 



Squillidae, 273. 



Stahl, E., 501. 



Starch, 481. 



Statogenesis, 485, 496. 



Stegocephali, 88, 109, 172. 



Stegophilus, 103. 



Stentor, 250. 



Stereognathus, 325. 



Stevenson, C., 432. 



Strain, 305, 311, 313, 319, 326, 327, 349, 

 281, 485, 519, 521. 



Strepsiptera, 213. 



Streptostylica, 114. 



Sturnella. magna, 52. 



Stypolophus, 335. 



Stypolophus ivhitiee, 339. 



Successional relation, 19, 62. 



Suidae, 69. 



Suoi'dea, 318, 324. 



Sus, 330. 



Symphysis mandibuli of a, chimpan- 

 zee, 164; gorilla, 164; liegois, 166 ; 

 orang, 164; Parisian, 166; Spy man, 

 164 ; Spy woman, 164. 



Synagodus, 59. 



Synapta digit at a, 213. 



Systems of evolution, 13. 



Table of the characters of the mam- 

 malian skeleton, 139. 



Tachyglossus, 135. 



Taeker, 195. 



Tahitian, 168. 



Tapir, 313. 



Tapiridae, 318. 



Tarsipes, 146. 



Tarsius, 155, 306. 



Taxeopoda, 128, 136, 146, 297, 357; car- 

 pus of, 



Taxidea. americana, 50. 



Teeth, evolution of, 318, 522. 



Teidae, 123. 



Teleology, 20. 



Teleostomata, 91, 99, 100, 101, 336. 



Tellkampf, Dr., 241. 



Terebratellidae, 178, 179, 180. 



Termites, 500. 



Tertiary, 184,291, 421. 



Testudinata, 114, 115, 116, 119, 123. 



Texas, 50, 436. 



Theory of internal causes, 527. 



Theory of use and disuse, 3. 



Theriodonta, 115, 116. 



Thermochemistry, 483. 



Theromora, 88, 114, 115, 116, 120, 121. 



132. 



Thoatherium, 359. 

 Thoraceras, 186. 

 Thoropa miliaris Sphix, 68. 

 Thylacinus cynocephalus, 22. 

 Tillodonta, 140, 143, 145, 329, 360. 

 Tomes, 381. 



Tomitherium rostratum Cope, 156. 

 Topinard, P., 153, 155, 157, 168, 165. 

 Tornier, E., 283, 284, 528. 

 Tortoises, 114. 

 Tortricidae, 123. 



Toxodontia, 128, 143, 297. 330, 360, 382. 

 Trachycephalus, 198. 

 Trachypteridae, 108. 

 Trachystomata, 109, in. 

 Tragulidae, 69. 

 Traquair, 99. 



Trias, 108, 113, 135, 184, 209, 325, 417. 

 Triboloceras, 186. 

 Trichea varia, 220. 

 Triconodon Owen, 343. 

 Triconodontidae, 318. 

 Trichophanes, 104. 

 Tridacna, 265. 

 Trilobita, 83. 

 Trimen, R. f 231. 



Trinil, man of, 159, 168, 169, 170. 

 Trionychidae, 303. 

 Tripteroceras, 186. 

 Tristichopteridae, 91. 

 Trityloden, 325. 

 Trivia, 260. 

 Trotting horses, 426. 

 Troglocaris, 242. 



Tubularia mesembryanthemum, 456. 

 Tunicata, 172, 214, 218, 362. 

 Turbot, 499. 

 Tyndall, Prof., 476. 

 Typhlogeophis, 123. 

 Typhlogobius, 244. 



