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, log, 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. 



Stiirnella magna, 52. 



Stypolophus, 335. 



Stypolophtis ■wlsiticp, 339. 



Successional relation, 19, 62. 



Suidae, 69. 



Suo'idea, 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. 



Synaptii digitata, 213. 



Systems of evolution, 13. 



Table of the characters of tlie 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 atnericaiia, 50. 



Teeth, evolution of, 318, 522. 



Teidae, 123. 



Teleology, 20. 



Teleostomata, 91, 99, 100, loi, 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. 

 Thoropd niiliaris Sphix, 68. 

 Thylacinus lynocephaliis, 22. 

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

 Tomes, 381. 



Toniitheriuni rostratuju 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, 11 1. 

 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., 231. 

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

 Trionychidae, 303. 

 Tripteroceras, 186. 

 Tristichopteridae, 91. 

 Trityloden, 325. 

 Trivia, 260. 

 Trotting horses, 426. 

 Troglocaris, 242. 



Tubularia vieseinbryantheiHum, 456. 

 Tunicata, 172, 214, 218, 362. 

 Turbot, 499. 

 Tyndall, Prof., 476. 

 Typhlogeophis, 123. 

 Typhlogobius, 244. 



