INDEX 



405 



duction of flowers, ii. 276 ; on regenera- 

 tion, ii. 32. 



Yoigt, Walter, experiments in regenera- 

 tion, ii. 6 ; on PJanarians, ii. 25. 



Voit, Carl von, influence of nutrition on 

 bodily size, ii. 268. 



Volvocineae, reproduction in, 257. 



Vries, de, asymmetrical curves of fre- 

 quency, ii. 234 ; theory of mutations, 

 ii, 317 ; Pangen theory, 380. 



Wagner, Franz von, i-egeneration in Liim- 



briculus, ii. 27. 

 Wagner, Moriz, on the influence of isola- 

 tion, ii. 284. 

 Wahl, Bruno, on the development of 



Erisialis, 399. 

 Wallace, on the immunity of Heliconiidaj, 



99 ; on the causes of the coloration of 



butterflies, 211. 

 Wasmann, Erich, on transition forms in 



ants, ii. 93 ; on sounds produced by 



ants, ii. 83. 

 Weaver birds, ii. 290. 

 Whales, their origin through adaptation, 



"• 313- 

 Wheeler, rule of the centrosphere in the 



ovum, 309. 

 Wiedersheim, mdimentary organs in man, 



ii. 226. 



Wiesner, the smallest vital particles, 369. 

 Wing-priniordia in insects, 364. 

 Winkler, Hans, experiments on artificial 

 2>artheuogenesis, 307, 333 ; on merogony, 



343- 

 Wolff, G., regeneration of the lens in 



Triton, ii. 19. 

 Wolff, K. v., the founder of the epigenetic 



theory of evolution, 352. 

 Wi'oughton, Kobert, j^roduction of sounds 



by Indian ants, ii. 95. 

 Wiirtemljerger, form-series of ammonites, 



ii. 176. 



Xenia, ii. 58. 



XijUna, protective colouring of, 82. 



Yolk of egg, 282. 



Zehnder, the living substance made up of 

 fistelltv, ii. 217 ; polymorphisnr in ants, 

 ii. 99 ; on the Lamaixkian principle, ii. 

 99-106 ; on the skeleton of Arthropods, 

 ii. 103 ; effect of amphimixis, ii. 223. 



Ziegler, Ernst, on deformities, ii. 138. 



Ziegler, H. E., experiments on merogony 

 in sea-urchin ova, 342. 



Zoja, experiments with the ova of Medusae, 

 407. 



Zoosperms, 273, 278, 279. 



D 



