440 



INDEX 



Vegetable cells, 96 



composition of, 85 



Vense cavae, 142 



Venus' fly-trap, 35, 36 



Verworn, 53 



Vesication, 60 



Virgil on spontaneous genera- 

 tion, 21 



Virulence, 334 



Viscera, regeneration of, 385 



Vision, development of, 160 



Vitalists, 81 



Vitreous body, 161 



Volvox, 118 



globator, 115, 117 



Vorticella, conductivity in, 70 

 mechanical stimulation of, 



45 

 nucleus of, 98 



Von Baer, 196, 216 

 on classification, 280 



Von Eiselberg on transplan- 

 tation, 398 



W 



WARM-BLOODED animals, effect 

 of temperature on, 39 



Wallace and evolution, 261 



Wasserman and Schultze on 

 blood, 290 



Water, stimulating influence of, 

 50 



Water vascular system, 130 

 Weismann on chromosomes, 



102 



on Spencer's theory of he- 

 redity, 225 

 Weismann's theory of germ 



plasm, 233 



White blood corpuscles, gran- 

 ules of, 94 



development of, 133 

 Wilson on Weismann's theory, 



240 



Wilt disease of cucumbers, 304 

 Wolff, Caspar Frederick, 195 

 Worms, locomotor apparatus of, 



126 



vascular system of, 130 

 Wounds, healing of, 384 

 Wright and opsonins, 359 



YOLK, 198 

 Youth, 90 



ZONA pellucida, 99 

 Zooprecipitation, 289 

 Zoospore, 176 

 Zygospore, 179 

 Zygotes, 175 



