( 406 ) 
INDEX. 
J^BBOTT. 
A. 
Abbott, C., on the battles of seals, ii. 
240. 
Abductor of the fifth metatarsal, 
presence of, in man, i. 128. 
Abercrombie, Dr., on disease of the 
brain affecting speech, i. 58. 
Abipones, marriage-customs of the, 
ii. 373. 
Abou-Simbel, caves of, i. 217. 
Abortion, prevalence of the practice 
of, i. 134. 
Abstraction, i. 62. 
Acalles, stridulation of, i. 384. 
Acanthodactylus capensis^ sexual dif- 
ferences of colour in, ii. 36. 
Accentor modularise ii. 198. 
Acclimatisation, difference of, in dif- 
ferent races of men, i. 216. 
AchetidsCe stridulation of the, i. 352, 
353, 355 ; rudimentary stridulating 
organs in female, i. 359. 
Acilius sulcatus, elytra of the female, 
i. 343. 
AcomuSe development of spurs in the 
female of, ii. 162. 
Acridiidsde stridulation of the, i. 352, 
356 ; rudimentary stridulating or- 
gans in female, i. 359. 
Acting, i. 232. 
Actinisee bright colours of, i. 322. 
Admiral butterfly, i. 392. 
Adoption of the young of other ani- 
mals by female monkeys, i. 41. 
Advancement in the organic scale. 
Yon Baer’s definition of, i. 211. 
Aeby, on the difference between the 
skulls of man and the quadrumana, 
i. 190. 
jEsthetic faculty, not highly deve- 
loped in savages, i. 64. 
Affection, maternal, i. 40 ; mani- 
festation of, by animals, i. 40 ; pa- 
ALCA. 
rental and filial, partly the result 
of natural selection, i. 81 ; shown 
by birds in confinement, for certain 
persons, ii. 110; mutual, of birds, 
ii. 108. 
Africa, probably the birthplace of 
man, i. 199 ; South, crossed popu- 
lation of, i. 225; South, retention 
of colour by the Dutch in, i. 242 ;; 
South, proportion of the sexes in 
the butterflies of, i. 310; tattooing 
practised in, ii. 339 ; Northern, 
coiffure of natives of, ii. 340. 
Agassiz, L., on conscience in dogs, i. 
78 ; on the coincidence of the races 
of man with zoological provinces, i. 
218 ; on the number of species of 
man, i. 226 ; on the courtship of the 
land-snails, i. 324; on the bright- 
ness of the colours of male fishes 
during the breeding season, ii. 13 ;: 
on the frontal protuberance of the 
males of Geophagus and Cichla, ii. 
13, 20 ; on the slight sexual differ- 
ences of the South Americans, ii. 
323 ; on the tattooing of the Ama- 
zonian Indians, ii. 342. 
Age, in relation to the transmissions 
of characters in birds, ii. 183; va- 
riation in accordance with, in birds, 
ii. 213. 
Ageldcus phamiceus, ii. 116. 
Ageronia feronia, noise produced by, 
i. 387. 
Agrion, dimorphism in, i. 363. 
Agrion Bamhurii, sexes of, i. 362. 
Agrionid^, difference in the sexes of, 
i. 362. 
Agrotis exclamationis, i. 369. 
Ague, tertian, dog suffering from, 
i. 13. 
Aithurus polytmuSe young of, ii. 220.. 
Ainos, hairiness of the, ii. 321. 
Alca tordoe young of, ii. 217. 
