INDEX 



A 



Abbot, 0., on the battles of seals, 647. 



Abductor of the fifth metatarsal, pres- 

 ence of, in man, 65. 



Abercrombie, Dr., on disease of the 

 brain affecting speech, 124. 



Abipones, marriage customs of the, 

 169. 



Abou-Simbel, caves of, 225. 



Abortion, prevalence of the practice 

 of, 70-71. 



Abstraction, power of, in animals, 

 117-118. 



AcaUes, atridulation of, 400. 



Acanthodaciylus ca^ensis, sexual dif- 

 ferences of color in, 463. 



Accentor modularis, 611. 



Acdimatizalion, difference of, in dif- 

 ferent races of men, 224. 



Aohetidse, stridulation of the, 371, 

 372, 375; rudimentary stridulating 

 organs in female, 378. 



Acilius sulcaius, elytra of the female, 

 364. 



Acomus, development of spurs in the 

 female of, 580. 



Acridiidae, stridulation of the, 372, 

 376; rudimentary stridulating or- 

 gans in female, 378. 



Acromio-baailar muscle, and quad- 

 rupedal gait, 65. 



Acting, universality of, 238. 



Actinias, bright colors of, 345. 



Adams, Mr., migration of birds, 148; 

 intelligence of nut-hatch, 530; on 

 the BombyciUa carolinensis, 594. 



Admiral butterfly, 407. 



Adoption of the young of other ani- 

 mals by female monkeys, 101. 



Advancement in the organic scale. 

 Von Baer's definition of, 219. 



Aeby, on the difference between the 

 skulls of man and the quadrumana, 

 200. 



.Esthetic faculty, not highly devel- 

 oped in savages, 129-130. 



Affection, maternal, 100 ; manifesta- 

 tion of, by animals, 101; parental 

 and filial, partly the result of nat- 

 ural selection, 144; mut,ual, of 

 birds, 529; shown by birds in 

 confinement, for certain persons, 

 531. 



Africa, probably the birthplace of 

 man, 208 ; South, crossed popula- 

 tion of, 232; South, retention of 

 color by the Dutch in, 256; South, 

 proportion of the sexes in the but- 

 terflies of, 330; tattooing practiced 

 in, 7" 9; Northern, coiffure of na- 

 tives oi, 740. 



Agaasiz, L., on conscience in dogs, 

 142 ; on the coincidence of the 

 races of man with zoological prov- 

 inces, 226; on the number of spe- 

 cies of man, 232 ; on the courtship 

 of the land-snails, 347 ; on the 

 brightness of the colors of male 

 fishes during the breeding season, 

 442; on the frontal protuberance 

 of the males of Geophagus and 

 Cichla, 442, 449; male fishes 

 hatching ova in their mouths, 

 449; sexual differences in color of 

 chromids, 449; on the slight sex- 

 ual differences of the South Ameri- 

 cana, 722; on the tatt(»ing of the 

 Amazonian Indians, 742. 



Age, in relation to the transmission of 

 characters in birds, 598; variation 

 in accordance with, in birds, 624. 



Agelceus phceniceus, 297, 537. 



Ageronia feronia, noise produced by, 

 . 402. 



Agrion, dimorphism in, 380. 



Ra/mhwii, sexes of, 380. 



Agrionidffl, difference in the sexes oj^ 

 380. 



Agrotis exclamationis, 413. 



(801) 



