426 



DUGONG. 



INDEX. 



ELLIOT, 



DuGONG, tusks of, ii. 242 ; nakedness 

 of, i. 148. 



DuJARDiN, on the relative size of the 

 cerebral ganglia in insects, i. 145. 



DuNCAX, Dr., on the fertility of early 

 marriages, i. 174. 



DuPONT, M., on the occurrence of the 

 supra-condyloid foramen in the hu- 

 merus of man, i. 29. 



DuRAND, J. P., on causes of varia- 

 tion, i. 113. 



DuREAU de la Malle, on the songs of 

 birds, i. 55; on the acquisition of 

 an air bv blackbirds, ii. 55. 



Dutch, retention of their colour by 

 the, in South Africa, i. 242. 



Duty, sense of, i. 70. 



DuVAUCEL, female Hylobates washing 

 her young, i. 40. 



Dl'AKS, pride of, in mere homicide, i. 

 94. 



DyU'i^tes, large size of males of, i. 

 347. 



Dynastini, stridulntion of, i. 381. 



Dytiscus, dimorphism of females of, 

 i. 343 ; grooved elytra of the fe- 

 male, i. 343. 



E. 



Eagle, young Cercopithecus rescued 

 from, by the troop, i. 75. 



Eagle, white-headed, breeding in 

 immature plumage, ii. 214. 



Eagles, golden, new mates found by, 

 ii. 105. 



Ear, motion of the, i. 20 ; external 

 shell of the, useless in man, i. 21 ; 

 rudimentary point of the, in man, 

 i. 22. 



Ears, piercing and ornamentation of 

 the, ii. 341. 



Uchidiia, i. 201. 



Echini, bright colours of some, i. 322. 



Echinodermata, absence of secon- 

 dary sexual characters in, i. 321. 



EcKER, figure of the human embryo, 

 i. 15 ; on sexual differences in the 

 pelvis in man, ii. 317 ; on the pre- 

 sence of a sagittal cx*est in Austra- 

 Hans, ii. 319. 



Edentata, former wide range of, in 

 America, i. 219 ; absence of secon- 

 dary sexual characters in, i. 268. 



Eduiius, racket-shaped feathers in, ii. 



73. 

 Edwards, Mr., on the proportion of 



the sexes in Xorth American species 



of Fajjilio, i. 309. 

 Egertox, Sir P., on the use of the 



antlers of deer, ii. 'Zo 



9.=,o . on the 



pairing of red deer, ii. 269 ; on the 

 bellowing of stao-s, ii. 275. 



Eggs, hatched by male fishes, ii. 20. 



Egret, Indian, sexes and young of, ii. 

 217. 



Egrets, breeding plumage of, ii. 82 ; 

 white, ii. 228. 



Ehrenberg, on the mane of the male 

 Hamadryas baboon, ii. 267. 



Ekstrom, M., on Harelda glacialis, ii. 

 122. 



Eluchista rufocinerea^ habits of male, 

 i. 311. 



Eland, development of the horns of 

 the, i. 289. 



Elands, sexual differences of colour 

 in, ii. 288. 



Elaphomyia, sexual differences in, i. 

 349. 



Elaphrus uUginosus, stridulation of, 

 i. 379. 



Elaps, ii. 31. 



Elaterid.e, proportions of the sexes 

 in, i. 313. 



Elaters, luminous, i. 345. 



Elephant, i. 200 ; nakedness of the, 

 i. 148 ; rate of increase of the, i. 

 135 ; Indian, polygamous habits of 

 the, i. 267 ; pugnacitv of the male, 

 ii. 240 ; tusks of, ii. 242, 243, 248, 

 249, 258 ; Indian, mode of fighting, 

 of the, ii. 257 ; male, odour emitted 

 by the, ii. 279 ; attacking white or 

 grey horses, ii. 295. 



Elevation of abode, modifying in- 

 fluence of, i. 120. 



Elimination of inferior individuals, 

 i. 172. 



Elk, ii, 249 ; winter change of the, 

 ii. 299. 



Elk, Irish, horns of the, ii. 259. 



Ellice Islands, beards of the natives, 

 ii. 322, 349. 



Elliot, R., on the numerical pro- 

 portion of the sexes in young rats, 

 i. 305 ; on the proportion of the 

 sexes in sheep, i. 3o5. 



