314 



INDEX 



Chellean epoch, 76-79. 

 Civilization, 118, 142, 143-144, 150, 

 227-231, 278-296. 



Civil society, 278-296. 



Clan, Australian, 254-255; Greek, 

 238; Iroquois, 240, 241, 242-243; 

 metronymic, 237-238 ; patrony- 

 mic, 237-238; Roman, 238. 



Climate, 20, 84-88, 133-145; and 

 altitude, 139; cycles, 140; and 

 depopulation, 140-141; and lati- 

 tude, 133-134; and natural selec- 

 tion, 20, 88, 137, 146, 222-226; 

 the pulsations of, 84, 141; 

 weather, 144-145. 



Color of skin, 206, 208-209, 221- 

 222. 



Commerce, 149-150, 160, 295. 



Communication, 111-114, 149-150, 

 158-160, 185-186; and density of 

 population, 146, 186; and isola- 

 tion, 152-166; laws of, 185-186. 



Competition, economic, 273, 274. 



Congenital variations, 6, 36-37. 



Consciousness of kind, 113. 



Continuity of germ plasm, 4-5. 



Continuous variation, 4-7. 



Cooley, C. H., cited, 113, 114, 122, 

 173, 199; quoted, 113, 114, 122- 

 123, 173. 



Cooperation, 105, 107, 110, 111. 



Cooperative group life, 105-lOG, 

 107. 



Corsica, the Island of, 153. 



Crania, 58-68. 



Crowd, the psychology of, 186-187. 



Culture, 87, 88, 121, 150, 151, 152- 

 160, 160-165; and dcn-ity of 

 population, 88, 151; and isola- 

 tion, 88, 150-157, 158-100; pre- 

 historic, 68-101; primitive, 68- 

 101, 233-296. 



Cumberland Gap, 149. 



Custom, 116, 137, 166, 171-202; 

 formation of, 178; and group sur 

 vivai, 116, 117-119 



Danubean race, 220, 226. 



Darwin, C, cited, 24, 30, 32, 39, 103, 



288. 

 Davenport, C. B., cited, 15, 17, 26, 



152. 

 Dealey, J. Q., cited, 279, 281, 285; 



quoted, 281-282. 

 Death-rate, 21-24. 

 DeFoe, D., quoted, 188, 

 Density of population, 88, 150-157 ; 



and civilization, 150-157; and 



culture, 88, 151. 

 De Quatrefages, cited, 220. 

 Descent, 29-30, 39-40, 46-49, 58-68 ; 



the theory of, 29-30, 39-40; the 



theory applied to human species, 



39-40, 46-49, 58-68. 

 DeVries, H., cited, 9, 10, 11. 

 Dexter, E. G., cited, 144. 

 Differentiation, 110. 

 Discontinuous variation, 6, 10. 

 Dolichocephalic head form, 204-205, 



215. 

 Domestication of animals, 91, 106, 



281, 293. 

 Dominant jNIendelian characters, 12- 



15. 

 Donovan, quoted, 112. 

 Druid's altars, 97. 



Education, 185. 



Egypt, 83, 142, 150. 



Elephants, reproduction in, 21. 



Embryo, human compared with 

 lower animals, 43-46. 



Endogamy, 247. 



Environment, 20, 32-37, 52-54, 84- 

 88, 121-170; as an influence ac- 

 celerating physical growth, 123- 

 133; arctic, 134; awe-inspiring 

 aspects of, 157-105; climatic in- 

 fluences of, 20, 52-54, 84-88, 133- 

 145; and the origin of human 

 qualities, 130-133; and isolation, 

 152-166; and migration, 140-150; 

 physical, 121; and religion, 169; 



