INDEX 



405 



duction of flowers, ii, 276 ; on regenera- 

 tion, ii. 32. 



Voigt, Walter, experiments in regenera- 

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



Voit, Carl von, influence of nutrition on 

 bodily size, ii. 268. 



Volvocinea?, reproduction in, 257. 



Vries, de, asymmetrical curves of fre- 

 quency, ii. 234 ; tlieory of mutations, 

 ii. 317 ; Pangen theory, 380. 



Wagner, Franz von, regeneration in Lum- 



briculus. ii. 27. 

 Wagner, Moriz, on the influence of isola- 

 tion, ii. 284. 

 Wahl. Bruno, on the development of 



EristaUs, 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, 



ii- 313- 

 Wheeler, rOle of the centrosphere in the 



ovum, 309. 

 Wiedersheimj rudimentary organs in man, 



ii. 226. 



Wiesner, the smallest vital i)articles, 369. 

 W^ing-primordia in insects, 364. 

 Winkler, Hans, experiments on artiflcial 



parthenogenesis, 307, 333 ; on merogony, 



343- 

 Woltt', (t., regeneration of the lens iu 



Triton, ii. 19. 

 Wolft", K. v., the founder of the epigenetic 



theory of evolution, 352. 

 Wroughton, Roltert, production of sounds 



by Indian ants, ii. 95. 

 Wiirtemberger, form-series of ammonites, 



ii. 176. 



Xenia, ii. 58. 



A'ylina, l^rotective colouring of, 82. 



Yolk of egg, 282. 



Zehnder, the living suljstance made up of 

 fistelUe, ii. 217 ; polymorphism in ants, 

 ii. 99 ; on the Lamarckian principle, ii. 

 99-106 ; on the skeleton of Arthropods, 

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



Ziegler, Ernst, on deformities, ii. 138. 



Ziegler, H. E., experiments on merogony 

 in sea-urchin ova, 342. 



Zoja, exi^eriments with the ova of Medusa?, 

 407. 



Zoosperms, 273, 278, 279. 



