bisiiop. 
INDEX. 
BLYTH. 
413 
between the brains of man and of 
the Orang, i. 11; figure of the 
embryo of the dog, i. 15; on the 
convolutions of the brain in the 
human foetus, i. 16 ; on the differ- 
ence between the skulls of man 
and the quadrurnnna, i. 190. 
Bishop, J., on the vocal organs of 
frogs, ii. 28 ; on the vocal organs 
of corvine birds, ii. 55 ; on the 
trachea of the Merganser, ii. 60. 
Bison, American, mane of the male, 
ii. 267. 
Bitterns, dwarf, coloration of the 
sexes of, ii. 179. 
Biziura lobata , musky odour of the 
male, ii. 38 ; large size of male, i i. 
43. 
Blackbird, sexual differences in the, 
i. 268 ; proportion of the sexes in 
the, i. 307 ; acquisition of a song by 
a, ii. 55 ; colour of the beak in the 
sexes of the, ii. 72, 227; pairing 
with a thrush, ii. 113 ; colours and 
nidification of the, ii. 170; young 
of the, ii. 219; sexual difference in 
coloration of the, ii. 226. 
Black-buck, Indian, sexual differ- 
ence in the colour of the, ii. 288. 
Blackcap, arrival of the male, be- 
fore the female, i. 259 ; young of 
the, ii. 219. 
Black-cock, polygamous, i. 269; 
proportion of the sexes in the, i. 
606; pugnacity and love-dance of 
the, ii. 45 ; call of the, ii. 00 ; 
moulting of the, ii, 83 ; duration 
of the courtship of the, ii. 100; 
sexual difference in coloration of 
the, ii. 226 ; crimson eye-cere of 
the, ii. 227 ; and pheasant, hybrids 
of, ii. ns. 
“Lack-grouse, characters of young, 
ii- 185, 194. 
Elackwall, J., on the speaking of 
the magpie, i. 59 ; on the desertion 
of their young by swallows, i. 84 ; 
°n the superior activity of male 
spiders, i. 272 ; on t he proportion 
°f the sexes iu spiders, i. 314 ; on 
sexual variation of colour in spi- 
ders, i. 337 ; on male spiders, i. 338. 
Bladder-nose Seal, hood of the, ii. 
278. 
Blaine, on the affections of doirs, ii. 
270. 
Blair, Dr., on the relative liability of 
Europeans to yellow fever, i. 243. 
Blake, C. 0., on the jaw from La 
Naulette, i. 126. 
Blakistox, Capt., on the American 
snipe, ii. 64; on the dances of 
Tetrao phasianettits, ii, 69. 
BlasiUS, Dr., on the species of Euro- 
pean birds, ii. 124. 
Bled ms tcuirus , hornlike processes of 
male, i. 374. 
Bleeding, tendency to profuse, i. 
292. 
Blenktron, Mr., on sexual prefer- 
ence in horses, ii. 272. 
Blennies, crest developed on the 
head of male, duriug the breeding 
season, ii. 12. 
B lei, him multipundata , stridulation 
of, i, 379. 
Bloch, on the proportions of the 
sexes in Fishes, i. 308. 
Blood, arterial, red colour of, i. 323. 
Blood-pheasant, number of spurs 
in, ii. 46. 
Bluebreast, red-throated, sexual dif- 
ferences of the, ii. 195. 
Blumenbach, on Man, i. Ill- 0 n the 
large size of the nasal cavities in 
American aborigines, i. 119; oifthe 
position of man, i. 190; on the 
number of species of man, i. 226. 
Bly i h, E., observations on Indian 
crows, i. 77 ; on the structure of 
tlie band iu species of Ifglobates , i. 
140; on the ascertainment of the 
sex of nestling bullfinches by pull- 
ing out breast-feathers, ii. 24; on 
the pugnacity of the males of Gal - 
linnla cristaict , ii. 41 ; on the pre- 
sence of spurs iu the female Euplo- 
camus er* 1 1 hrophl halmiis, ii. 46 ; 
on the pugnacity of the amadavat, 
ii. 49; on the spoonbill, ii. 60; on 
the moulting of Anthus, ii. 83 ; on 
the moulting of bustards, plovers, 
and Gallu-s bankiva, ii. 84 ; on the 
Indian honey-buzzard, ii. 126 ; on 
sexual differences in the colour oi 
the eyes of hornbills, ii. 129 ; on 
Oriolus melanocephalus , ii. 178 ; on 
Palxornis javanicus, ii. 179 ; on the 
