444 



INDEX 



Striated muscle, 363, 364. 



Strophiole, 66. 



Struggle for existence, 61. 



Style, 31, 33. 



Suffocation, 389. 



Sugar, osmosis of, 112. 



Sundew, 140. 



Swarming, 252, 



Sweat glands, structure of, 395, 396 ; 



use of, 396; 



under nen^ous control, 397. 

 Sweeping and dusting, 387. 

 Symbiosis, in lichens, 173; 



between crab and sea anemone, 

 224. 

 Symmetry, in flower, 41. 

 Sympathetic system, 337. 

 Systematic botany, 150. 

 Systole, 353. 



Tactile corpuscle or organ, 395, 419. 



Taste buds, 420. 



Teeth, dental formula, 333; 



in frog, 331; 



in man, 332; 



internal structure of, 333. 

 Teleutospore, 165. 

 Temperature, in germination, 80. 

 Tendrils, 120. 

 Tern, common, 306. 

 Testa, 66. 

 Tetanus, 171. 

 Thallophytes, 151, 159. 

 Thallus, 142. 

 Tissue, defined, 25; 



cells, 189. 

 Tissues and organs, 188. 

 Toad, economic value of, 283; 



field work on, 283; 



horned, 288; 



tadpoles, 283. 

 Tobacco, effect of, on circulation, 

 361; 



effect on muscles, 370; 



relation to respiration, 386, 389; 



use of, 329. 

 Tortoise, box, 287. 

 Trachese, 229; 



structure of, 381. 



Transpiration, ettect of, within stem 

 (Exp.), 137; 



experiment showing, 134; 



regulation of, 136; 



water lost by (Exp.), 135. 

 Trichina, 213, 214. 

 Trimorphic flower, 46. 

 Tube feet, 203. 

 Tuber, 118, 119. 

 Tubercles, in infected lungs, 171 ; 



on roots of a legume, 96. 

 Tuberculosis, 171. 

 Tumble weed, 60. 

 Turtle, mud, 286; 



painted, 286; 



spotted, 286. 

 Turtles, adaptations in, 286. 

 Tussock moth, 238. 

 Tympanic membrane in frog, 279. 

 Typhoid, 160, 170. 



Ungulates, even-toed, 315; 



hoofed, 314; 



odd-toed, 315. 

 Univalve, 265. 

 Umbel, 48. 

 Upper limbs, in frog, 371, 374; 



in man, 372, 374. 

 Urea, 393. 

 Uredospore, 165. 

 Urine, 393. 



Uriniferous tubules, 392. 

 Urino-genital system of frog, 391. 



Vacuole, contractile, 180, 181, 182. 



Vacuole, food, 180. 



Valves, in human heart, 352 ; 



in human veins, 356. 

 Vegetation, in temperate zones, 149; 



of cold regions, 147; 



of tropics, 148. 

 Veins, valves in, 356; 



function of, 355; 



structure of, 355. 

 Venation, palmate, 123; 



parallel, 124; 



pinnate, 125. 

 Ventilation, in sleeping rooms, 388; 



need of, 387 ; proper, 387. 



