INDEX 



407 



Coblentz, specific light-signals in fire- 

 flies, 150 

 Cochlicella, colonial divergence, 99, 137 

 — , lack of geographical races, 108 

 Cockayne and Allan, simple and com- 

 pound species, 73 

 Coereba, change in population, 215 

 Cole and Bachuber, defects induced by 



lead acetate, 30 

 Coleophora, influence of diet on colour, 



79 

 Colias, polymorphic species, 282 



Collectivart, 71 



Collembola, lack of geographical races, 



108 



Collinge, on Arion empiricorum, 20 



Colonies of land snails, 1 1 7 



— of rabbits, 117 



Colour, determination by diet, 79 



— , differences between species, 279-83 



— , difficulty of deciding whether 



warning or protective, 280 



— , evolution of specific differences, 



2 79 

 — , role in species recognition, 79, 



148 

 Colour-changes, in Leptinotarsa, 37 

 — , in pupae of Pieris, 37 

 — , in pupae of Plutella, 38 

 Combination (type of correlation), 161 

 Compensation, 353 

 — , further examples, 360 

 — , in behaviour and physiology, 354 

 — , in structure, 353-54 

 Competition, inter-uterine, 334 

 Complex organs, 306-9 

 Complexity, exaggerated, of parts, 331 

 Conklin, dwarfing in Crepidula, 81 

 Continuous variation, 5 

 Convergence, between Edentata and 



Cetacea, 356 

 — , in colour, 256 

 Co-ordination, 306 

 Cope, on ' use ' and ' disuse,' 324 

 Cope and Wigand, views on evolution, 



369 

 Copepoda, growth-rate in north and 



south, 123 

 — , lack of geographical races, 1 10 

 — , local dimorphism in size, 123 

 Coptolabrus, polymorphism, 101 

 Copulatory apparatus, see Genitalia 

 Coral snakes, parallel variation, 326 

 , significance of bright colours, 



243-44 

 Corals, influence of mechanical 



stresses, 81 

 Cordylophora lacustris, spread of, 322 

 Cornborer, see Pyrausta 

 Correlation, 160 and foil. 

 — , male and female genitalia, 161 



Correlation, relation to Natural Selec- 

 tion, 161 

 — , structure and habit, 266, 283-90 



, Blepharoceridae, 300 



, Psammocharidae, 276-78 



— , structure and viability, Drosophila, 

 205 



, Philosamia, 207 



, Vespa, 208 



Corset, on co-adaptations, 308 



Cott, area occupied by Lacerta simonii, 



"7 



Cottus, age of species, 132 



Courtship, relation to isolation, 149-51 

 Coutagne, intermediacy in Cepea, 88 

 — , polymorphism, 1 1 

 Crabro leucostomus, predacious habits, 51 

 Crabronidae, predacious habits, 51 

 — , structures for grasping the female, 



294 

 Crampton, change in population of 



Partula, 215 

 — , colonial divergence in Partula, 96 

 — , distribution of races of Partula, 82 

 — , intermediacy due to crossing, 88 

 — , local races, 66 

 — , polymorphism, 282 

 — , racial divergence in land snails, 



323 

 — , selective elimination of Philosamia, 



206-7 

 Crangon, races with different breeding 



seasons, 145 

 Crepidula, dwarfing, 81 

 Crozier, influence of size of mollusca 



on mating, 156 

 Crustacea, elaborate appendages in 



males, 332 

 — , insular forms, 1 35 

 — , tubes and cases as protection 



against environment, 360 

 Cryptic patterns, 280-81 

 Ctenagenia, tarsal ' comb,' 277 

 Ctenophthalmus, geographical races, 1 1 3 

 Cuckoo, evolution of resemblance in 



eggs to those of foster parents, 



266-69 

 Cuenot, co-adaptations, 308 

 — , Cuckoo's eggs, 267 

 — , definition of adaptation statistique, 351 

 — , enlargement of tibia in Anisoscelis, 



331 



— , fluctuations, 19 



— , noxious animals exhibiting homo- 

 chromy, 244 



■ — , protective resemblance, 233 



— , races of Rana and Sepia with differ- 

 ent breeding seasons, 145 



— , survival of mutants without aid of 

 selection, 319 



— , winter moult in Putorius, 241-42 



