INDEX, 



471 



Vertebrata, late origin of repro- 

 ductive cells in, 74. 



Vespa, 54. 



Viola calcarata, fertilization of, 

 318 ; tricolor, 428 



Vitrinae, length of life of, 56. 



Volvocineae, 206, 253. 



Volvox, 208, 254. 



Vorticellidae, conjugation of buds 

 of, 294. 



Vult\ires, length of life of, 11, 37. 



"Wallace, on constancy of number 

 of individuals in successive gen- 

 erations, 13; on production of 

 death by natural selection, 23. 



Wasps, duration of lie ol inak- and 

 fcmulc, 19, 54 ; loss of cinbryonie 

 limbs in development of larva of, 

 89. 



"Westphal, on epilepsy in {guinea- 

 pigs, 323. 



"Whales, length of life of, 6 ; adap> 

 tation in, 268 



"White mice, experiments in the 

 transmission of mutiialions on, 



444- 

 "Will, on origin of ova, 226. 

 "Wolff, on theory of epigeiusis.325. 



Zacharias, on the inheritance of 

 mutilations, 438, 



THE END. 



