INDEX 



stratified epithelium, 56, Fig. 18. 



rocks, 282286. 

 striped muscle, 57, Fig. 22. 

 struggle for existence, 



A. E. Wallace on, 389. 

 Buffon on, 368. 

 Charles Dai-win on, 386. 

 importance of, 397, 398, 400. 

 Lamarck on, 381. 

 stump tails, 179. 

 style, of flower, 107. 

 Stylidium graminifolia, fertilization, 



362. 



subclasses, 226. 

 subfamilies, 226. 

 subgenera, 225. 

 subkingdoms, 226. 

 suborders, 226. 

 substantive mutations, 154. 



,, variations, 148, 150. 



succulent plants, 350. 

 Sumner, F. B., 182. 

 sun, dependence of life upon, 5. 

 suprascapula, 234. 

 surface, relation to volume, 20. 



,, tension, 19. 

 survival of fittest, 391. 



,, ,, Buffon on, 368. 



,, ,, Charles Darwin on, 



387. 

 ,, ,, in inorganic world, 



395. 



suspensor, 49. 

 Svalof, 412. 



sweet peas, reversion in, 208. 

 swim bladder and lungs, 255, 256. 

 synaposematic groups, 343 346, 



Fig. 176. 



synapsis, 133, 137, 206, Figs. 65, 66, 

 "68. 



synaptic mates, 135. 

 syncytia, 66. 



syncytial epithelium, 67, Fig. 28. 

 syndesis, 137 (see also synapsis). 

 syngainy, 83 (see also conjugation). 

 Bystematist, work of, 226. 



T. 



TADPOLE, ascidian, 277, Fig. 130. 



frog, 272, Fig. 121. 



stage, 278, 279. 

 tail, in man, 261, 262, 424. 

 tails, mutilation of, 178, 179. 

 tapir, feet, 241, Fig. 96. 

 tarsals, 237. 

 taxonomic tree, 228, 229, Fig. 86, 



taxonomy, 226. 



aims of, 229. 



teeth, of Cetacea, 317, 318, Figs. 162, 

 163. 



,, ,, dog and thylacine, 251 

 253, Figs. 107, 108. 



,, ,, elephants, 314. 



,, horses, 309. 



,, vestigial, 260. 

 Teleostei, 292. 

 telescoping of generations, 111, 112, 



122. 



temperature of body, 6. 

 tentacles, 115, 118. 

 Tertiary Era, 284, 285. 

 testis, 113, 116. 

 Tetrabelodon angiistideus, 314, Fig. 



159. 

 ,, lovgirostris, 314, Fig. 



159. 

 Tetraxonida, spicules, 232, Figs. 88, 



187. 



Theosodon, 253, Fig. 109. 

 Theromorpha, 296. 

 Thoatherium, 253, Fig. 109. 

 thrum-eyed flowers, 356. 

 thylacines, 301. 



Thylacinus, 251, Figs. 107, 108. 

 tibia, 237. 

 time, geological, 285 287. 



, , importance in evolution, Buffon 

 on, 366. 



,, in evolution of horse, 311. 



,, scale, geological, 284. 

 Tinoceras, 303, 406, Fig. 150. 

 Tintinnopsis, Fig. 9. 

 tissue-formation, 45, 50, 51, 75 79. 

 tissues, 37, 51 65. 

 Tithorea harmonia, 345, Fig. 176. 

 tools, use of, 424, 425. 

 torpedo, 256. 

 tortoise, 33 i. 



Tower, W. L., 156, 159, 184. 

 Tradescantia, histology of, 61 65, 



Figs. 25, 26. 

 transformation of species (see 



species), 

 transparency, of pelagic animals. 



322, 336. 



tree-like classification, 228, 229, Fig 

 86. 



,, evolution, 221. 

 Trematoda, parthenogenesis, 14-1, 

 Triassic Epoch, 284. 

 Triceratops, 299, Fig. 146. 

 trichocysts, 39. 

 Triconodon, 302. 



