INDEX. 



A. 



Abbott, C, on the battles of seals, ii. 229. 



Abductor of the fifth metatarsal, presence 

 of, in man, i. 123. 



Abercrombie, Dr., on disease of the brain 

 affeeting speech, i. 56. 



Abipones, marriage-customs of the, ii. 356. 



Abou-Simbel, caves of, i. 209. 



Abortion, prevalence of the practice of, i. 

 129. 



Abstraction, i. 60. 



AettUe.% stridulation of, i. 372. 



Acanthorluctylus capensis, sexual differ- 

 ences of color in, ii. 34. 



Accentor mod ularis, ii. 1S9. 



Acclimatization, difference of, in differ- 

 ent races of men, i. 209. 



Acheticlm, stridulation of the, i. 341, 342, 

 34S ; rudimentary stridulating organs in 

 female, i. 343. 



Acilius sulcatum, elytra of the female, i. 

 883. 



Acomus, development of spurs in the fe- 

 male of. ii. 154. 



Aoridiidce, stridulation of the, i. 342, 345; 

 rudimentary stridulating organs in fe- 

 male, i. 34S. 



Acting, i. 224. 



Actiniae, bright colors of, i. 313. 



Admiral butterfly, i. 3S0. 



Adoption of the young of other animals 

 by female monkeys, i. 39. 



Advancement in the organic scale, Yon 

 Baer's definition of, i. 203. 



Aedy, on the difference between the skulls 

 of man and the quadrumana, i. 1S3. 



^Esthetic faculty, not highly developed in 

 savages, i. 62. 



Affection, maternal, i. 39 ; manifestation 

 of, by animals, i. 39 ; parental and filial, 



?artly the result of natural selection, i. 

 7 ; shown by birds in confinement, for 

 certain persons, ii. 105 ; mutual, of birds, 

 ii. 104. 

 Africa, probably the birthplace of man. i. 

 191; South, crossed population of, i. 217, 



South, retention of color by the Butch 

 in, i.-233; South, proportion of the sexes 

 in the butterflies of, i. 301; tattooing 

 practised in, ii. 323 ; Northern, coiffure 

 of natives of, ii. 324. 



Agassiz, L., on conscience in dogs, i. 75 ; 

 on the coincidence of the races, of man 

 with zoological provinces, i. 210; on the 

 number of species of man, i. 21S ; on the 

 courtship of the land-snails, i. 315 ; on 

 the brightness of the colors of male fishes 

 during the breeding-season, ii. 12; on the 

 frontal protuberance of the males, of 

 GeopJiagm and Oichla, ii. 13, 26; oh the 

 slight sexual differences of the South 

 Americans, ii. 3i)8; on the tattooing of 

 .the Amazonian Indians, ii. 326. 



Age, in relation to the transmission of 

 characters in birds, ii. 175; variation in 

 accordance with, in birds, ii. 203. 



Agelceus Phoeniceus, ii. 111. 



Ageronia feronia, noise produced by, i. 

 375. 



Agrion, dimorphism in, i. 352. 



Agrion Ramburii, sexes of, i. 351. 



Agrionidjs, difference in the sexes of, i. 

 361. 



Agrotis exclamationis, i. 353. 



Ague, tertian, dog suffering from, i. 12. 



A'ithurus polytmus, young of, ii, 211. 



Aionos, hairiness of the, ii. 306. 



Alcit tarda*, young of, ii. 203. 



Alces palmiitu, ii. 247. 



Alder and Hancock, MM., on the nudi- 

 branch mollusca, i. 317. 



Algen, Mr., on the stridulation of Scolytus, 

 i. 368. 



Allen, J. A., on the relative size of the 

 sexes of Cal/orhinus ursiiius, ii. 243 ; 

 on the mane of Otaria jubata, U. 255 ; 

 on the pairing of seals, ii.'257 ; on sexual 

 differences in the color of bats, ii. 273. 



Allen, S., on the habits of ffoplopterus, 

 ii. 46 ; on the plumes of herons, ii. 79 ; 

 on the vernal moult of Herodias, bub ul- 

 cus, ii. 80. 



Alligator, courtship of the male, i. 264 

 ii. 27 ; roaring of the male, i. 322. 



