452 



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 Darwin on, 386. 

 importance of, 397, 398, 400. 

 Lamarck on, 381. 

 stump tails, 179. 

 style, of flower, 107. 

 StyUdium graminifolia, fertilization, 



362. 



subclasses, 226. 

 subfamilies, 226. 

 subgenera, 225. 

 subkingdoms, 226. 

 suborders, 226. 

 substantive mutations, 154. 



,, variations, 148, 150. 



succulent plants, 350. 

 Summer, F. B., 182. 

 sun, dependence of life upon, o. 

 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). 

 syngamy, 83 (see also conjugation), 

 systematist, 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 angustidens, 314, Fig. 



159. 

 longirostris, 314, Fig. 



159. 

 Tetraxonida, spicules, 232, Figs. 88, 



187. 



Theosodon, 253, Fig. 109. 

 Theromorpha, 296. 

 Thoatheriurn, 253, Fig. 109. 

 thrum-eyed flowers, 356. 

 thylacines, 301. 



Thylacinus, 251, Figs. 107, 108. 

 tibia, 237. 

 time, geological, 285287. 



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, 5165. 

 Tithorea harmonia, 345, Fig. 176. 

 tools, use of, 424, 425. 

 torpedo, 256. 

 tortoise, 334. 



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, 144. 

 Triassic Epoch, 284. 

 Triceratops, 299, Fig. 146. 

 trichocysts, 39. 

 Triconodon, 302. 



