INDEX. 739 



Duncan, Dr., on the fertility of early marriages, 156, comparative 

 health of married and single, 159. 



Dupont, M., on the occurrence of the supra-condyloid foramen in 

 the humeius of man, 24. 



Durand, J. P.. on causes of variation, 34. 



Bureau de la Malle, on the songs of birds, 97; on the acquisition 

 of an air by blackbirds, 421. 



Dutch, retention of their color by the, in South Africa, 319. 



Duty, sense of 110. 



Duvaucel, female Uylobates washing her young, 79. 



Dyaks, pride of, in mere homicide, 132. 



Dytmstes, large size of males of, 316. 



Dynastini, stridulation of, 344. 



Dytisciis, dimorphism of females of, 313; grooved elytra of the 

 female, 313. 



Eiagle, young Cercopithecus rescued shell, by the troop, 115; cer- 

 copithecus, white-headed, breeding in immature plumage, 552. 



Eagles, golden, new mates found by, 463. 



Ear, motion of the, 15; external form of the, useless in man, 15; 

 rudimentary point of the, in man, 16. 



Ears, more variable in men than women, 253; piercing and orna- 

 mentation of the, 656. 



Earwigs, parental feeling in, 120. 



Echidna, 178. 



Echini, bright colors of some, 295. 



Ekihinodermata, absence of secondary sexual characters in, 294. 



Kchis carinata, 400. 



Ecker, figure of the human embryo, 11; on the development of the 

 gyri and sulci of the brain, 232; on the sexual differences in the 

 pelvis in man, 635; on the presence of a sagittal crest in Australians, 

 636. 



Edentata, former wide range of, in America, 193; absence of secon 

 dary sexual characters in, 246. 



Edolius, racket-shaped feathers in, 436. 



Edwards, Mr. , on the proportion of the sexes in North American 

 species of PapUio, 283. 



Eels, hermaphroditism of, 184. 



Egerton, Sir P., on the use of the antlers of deer, 581, 582; on the 

 pairing of red deer, 595; on the bellowing of stags, 601. 



Eggs, hatched by male fishes, 391. 



Egret, Indian, sexes and young of, 553. 



Egrets, breeding plumage of, 442; white, 560. 



Elirenberg, on the mane of the male Hamadryas baboon, 594. 



Ekstrom, M., on Ilarclda glacifilis, 478. 



Elachista rufocinerea, habits of male, 284. 

 , Eland, development of the horns of the, 265. 



Elands, sexual differences of color in, 611. 



Elaphomyia, sexual differences in, 317. 



Elaphrus uliginosua, stridulation of, 343. 



Elnps, 400. 



Elateridae, proportion of the sexes in, 286. 



Elaters, luminous, 315. 



Elephant, 178; rate of increase of the, 53; nakedness of the, 63; 



