Buffon on effect of castration 



106 

 Butterflies, sexual difference 



in, 196 



Callionymus, 197 

 Cattle, hybrids from, 130 

 Cause of sex, 316 

 Ceratophora, 198 

 Chamelion, 199 

 Changed conditions cause sub 

 sequent generations to vary 

 149 



Cherry, variation of, 149 

 Cladocera, sexual differences 



in, 175 



Glaus on parthenogenesis, 58 

 Colin on parthenogenesis, 66 

 Cotor changed by a change of 



food, 90 



Congenital characters not al- 

 ways hereditary, 93 

 Conn on cause of variation, 294 

 Copepoda, sexual differences 



in, 175 



Correllated variation, 84, 157 

 Crabs, sexual differences in, 186 

 Crayfish, dimorphism in, 188 

 Crossing as a cause of reversion 



132 



Crossing as a cause of varia- 

 tion, 119 



Cryptophyalus, 183 

 Cultivated plants, variation of 



146 



Cyclops, sexual differences in 

 175 



Dall on saltatory evolution, 83 

 Daphnia, parthenogenesis in 

 57 



Darwin, 85 



on bud variation of 



of orange, 147 

 yon causes of variation, 



275 



on compound person- 

 ality, 114 

 on complexity of the 



germ, 114 



on correllated varia- 

 tion, 84 



on direct action of ex- 

 ternal conditions, 90 

 on evolution of eye 

 282 



Spanned peacock, 

 299 



on latent transmission 

 of sexual characters, 

 105 



on modification of 

 male butterflies, 196 

 on pangenesis, 48 

 on parallel or analo- 

 gous variation, 302 

 on reciprocal hybrids, 



129 

 on reversion, 10, 115, 



132 

 on reversion in horse 



133 



i on selection, 12 

 on sexual characters 



of birds, 199 

 on sexual selection, 



169, 212 

 on transmission by 



each sex, 100 

 on transmission with- 

 out fusion, 131 



