4-o6 



INDEX 



Carbonicola, correlation of characters, 



163 

 Carcinus, natural selection, 197 

 Cardium, in the Sea of Aral, 169 

 Carpenter, change of habits in insects, 



54 

 Carrell, the ' New Cytology,' 363 

 Carrion Crow, discontinuous geo- 

 graphical races, 116 

 Carruthers, lineages in ^aphrentis, 66 

 Carychium, lack of geographical races, 



108 

 Castes in Hymenoptera, 12 

 Castle, experiments on pure lines, 191 

 — , Haldane's explanation of tachy- 



genesis, 329, 334 

 Castle and Phillips, ovarian trans- 

 plants in guinea-pig, 31 

 Castle and Wright, correlation, 170 

 Categories, genetical, 71 

 — ■, palaeontological, 65 

 — -j physiological, 73 

 — , status doubtful, 61 

 — , taxonomic, 61 

 — , types of, 59 

 Cave-fauna, blindness, 43, 47 

 — , general characters, 269, 270-71 

 Cavia, experiments on, 36 

 Cell-cleavage, 362 

 Cepea, colonial divergence, 95, 96 

 — , colour forms in relation to evolution 



of dominance, 229 

 — , intermediacy, 88 

 — •, lack of geographical races, 108 

 — , mating habits, 150 

 — , selection of colour-forms by birds, 



200-1, 203-4 

 Cephalopoda, adhesive organ, 308 

 — , modifications of deep-sea forms, 



270 

 Cephus, death-rates in nature, 193 

 Ceratium, 7 



Cerion, hereditary stability of races, 70 

 Ceropalinae, habits, 276, 277, 278 

 — , tarsal ' comb,' 277 

 di Cesnola, experiments on Mantis, 202 

 — , observations on Arianta, 2 1 2 

 Cetacea, convergence with Edentata, 



356 

 Cetonia, melanic variety, 93 

 Chaffinch, local variation in song, 121 

 Champy, orthogenesis, 326 

 — , theory of sexuality and hormones, 



339 



Chance survival, 318 



Chapin, adaptive differences in Pyre- 

 nestes, 289 



Chapman and Griscom, species-inter- 

 gradation in Troglodytes, 89 



Chapman, R. N., fluctuations in 

 insects, 19 



Chapman, R. N., and others, choice of 

 habitat in desert animals, 360 



Chapman, T. A., colour-convergence 

 in Erebia, 260 



Characters, genetic determination, 23 



Charaxes, intrageneric mimicry, 256 



— , protection from bird-attack, 253 



Cheesman, protective resemblances in 

 desert birds, 240 



— , see also Meinertzhagen 



Cheesman and Hinton, factors isolating 

 species of Meriones, 1 34 



Chermesidae, modification of life- 

 cycle, 356 



Chironomidae, species differing in 

 habits more than in structure, 122 



— , species separable only in male 

 sex, 121 



Chlorion, polymorphism in, 103 



Cholera Vibrio, immunity of Galleria to, 



3 8 

 Christy, lack of geographical races in 



Bubalis, 106 

 Chromosomes, effect of additional, 23 

 — , lack of evidence for qualitative 



division, 174 

 Chrysomelidae, correlation between 



male and female genitalia, 153 

 Chrysotoxum, mimicry of wasps, 257 

 Cicadas, differences in song, 121 

 — -, habitat-differences, 146 

 — , seventeen-year species, isolation of 



broods, 142 

 Cicindela, specific differences in habitat, 



.'45. 305 



Ciona, experiments on, 37 



Citellus, coat-colour on lava fields, 236 



Cladocera, non-heritable racial charac- 

 ters, 70 



Clam, Giant, as an example of 

 hypertely, 333 



Clark, species intergradation in Lepi- 

 doptera, 89 



Clausilia, colonial divergence, 94, 95, 

 163 



— , comparison of old and young shells, 

 211 



— , correlation of characters, 163 



— , ribbed forms in the Alps, 289 



Cleonus, protective coloration, 281 



Clone, 72 



Clupeid fish, age of Caspian species, 

 132 



Cnemidophorus, adaptive differences, 

 289 



Cnephasia, species with similar genitalia, 



154 

 Co-adaptation, 306-9 



— , genitalia, 299 



— , habit and structure, 301 



Coati, insect food of, 255 



