3^4 



INDEX 



Sea-shore, 346. 



Sea swift, edible nest of, 164. 



Seebohm, 292. 



Seeds, 318. 



Seed-scattering, 241, 274. 



Selection, sexual and natural, 145. 



Semon, 9, 14. 



Semper, Prof., 22, 333, 336. 



Senescence, 365. 



Senility, 365. 



Sense of direction, 298. 



Sequoia, n. 



Sex, 215. 



Sex dimorphism, 136. 



Sharp, Dr. David, 87. 



Shepherding among animals, 130. 



Sleeping Beauty, 312. 



Snowy owl, 343. 



Song of birds, 149. 



Sorby, H. C., 175. 



Spencer, 154, 220. 



Spiders, 255. 



Spring flowers, 93. 



Squirrel, 344. 



Stahl, Prof., 252. 



Storing, 247, 344. 



Strasburger, 277. 



Struggle for existence, 353. 



Summer, Biology of, 103. 



Flowers, 112. 



Industries, 123. 



Tadpoles, 32, 207. 

 Tailor ant, 133. 

 Tegetmeier, 81. 



Thienemann, Dr., on migration 

 routes, 78. 



Thompson, D'Arcy W., 173. 

 Thorndike, 195. 

 Tower, Prof., 208. 

 Treviranus, 357. 



Variational stimuli, 209. 

 Variations, 214, 221. 

 Verworn, 5. 

 Vestiges of Creation, 62. 

 Vines, Prof., 64, 116, 117. 

 Vital rhythms, 5. 

 Voracity of caterpillars, 55. 



Wallace, A. R., 3, 57, 83, 121, 145, 

 154, 158, 160, 167, 200, 280, 291, 

 292, 293. 



Warm-blooded animals, 335. 



" Water-babies," 26. 



Water plants, multiplication of 

 minute, 67. 



Web of life, 161, 218, 260. 



Weismann, 146, 182, 357, 367. 



Whelk, capsules of, 29. 



Whirlpool, living matter as a, 12. 



White, Gilbert, 3, 255, 281, 344. 



White colour, 339. 



Whitman, 328. 



Winter, 311. 



Witchell, 152. 



Withering leaves, 242, 250. 



Yarrell, 80. 

 Young things, 26. 

 Youthfulness, note of, in spring, 26 

 Yung, Prof. E., 39, 202. 



Zacharias, 67. 



Printed by MORRISON & GiBB LIMITED, Edinburgh 



