WONDER. 
INDEX. 
ZyG^ENIDjE. 
475 
ii. 372; freedom of selection by, 
in savage tribes, ii. 372. 
Wonder, manifestations of, by ani- 
mals, i. 42. 
Wonfor, Mr., on sexual peculiarities ! 
in the wings of butterflies, i. 345. j 
Woolner, Mr., observations on the 
ear in man, i. 22. 
Wood, J., on muscular variations in 
man, i. 109, 128, 129 ; on the i 
greater variability of the muscles 
in men than in women, i. 275. 
Wood, T. W., on the colouring of the j 
orange-tip butterfly, i. 394; on 
the habits of the Satumiid®, i. 
398 ; on the habits of Mennru 
Alberti, ii. 56; on Tetrao eupido, 
ii. 56 ; on the display of plumage 
bv male pheasants, ii. 89 ; on the 
ocellated spots of the Argus phea- 
sant, ii. 144 ; on the habits of the 
female Cassowary, ii. 204. 
Woodcock, coloration of the, ii. 
226. 
Woodpecker, selection of a mate by 
the female, ii. 116. 
Woodpeckers, ii. 56 ; tapping of, 
ii. 62 ; colours and nidification of 
the, ii. 171, 174, 223 ; characters 
of young, ii. 185, 199, 209. 
Worm at. d, Mr., on the coloration of 
Hypopyra, i. 397. 
Wounds, healing of, i. 13. 
Wren, ii. 198; young of the, ii. 209. 
Wright, C. A., on the young of 
Orocetes and Petrocincla, ii. 220. 
Wright, Chauncey, on correlative j 
acquisition, ii. 335 ; on the enlarge- j 
ment of the brain in man, ii. 391. 
Wright, Mr., on the Scotch deer- 
hound, ii. 261 ; on sexual preference 
in dogs, ii. 271 ; on the rejection of 
a horse by a mare, ii. 272. 
Wright, W. von, on the protective 
plumage of the Ptarmigan, ii. 81. 
Writing, i. 182. 
Wyman, Prof., on the prolongation of 
the coccyx in the human embryo, 
i. 16 ; on the condition of the great 
toe in the human embryo, i. 17 ; on 
variation in the skulls of the natives 
of the Sandwich Islands, i. 108 ; on 
the hatching of the eggs in the 
mouths and branchial cavities of 
male fishes, i. 210, ii. 20. 
X. 
Xenarciiub, on the Oicadse, i. 350. 
Xeiwrhynchus, sexual difference in the 
colour of the eyes in, ii. 129. 
Xip/wpJwrus Hellerii, peculiar anal fin 
of the male, ii. 9, 10. 
Xylocopa, difference of the sexes in, i. 
366. 
Y. 
Yarrell, W., on the habits of the 
Cyprinidie, i. 309 ; on Baia clavata, 
ii. 2; on the characters of the male 
salmon during the breeding season, 
ii. 4, 14; on the characters of the 
rays, ii. 6; on the gemmeous drago- 
nct, ii. 8 ; on the spawning of the 
salmon, ii. 19 ; on the incubation of 
the Lophobranehii, ii. 21 ; on rivalry 
in song-birds, ii. 53 ; on the trachea 
of the swan, ii. 60 ; on the moulting 
of the anatida, ii. 85 ; on an in- 
stance of reasoning in a gull, ii. 108; 
on the young of the waders, ii. 217. 
Yellow fever, immunity of negroes 
and mulattoes from, i. 243, 
Youatt, Mr., on the development of 
the horns in cattle, i. 284. 
Yura-CAUAS, their notions of beauty, 
ii. 347. 
Z. 
Zebra, rejection of an ass by a female, 
ii. 295 ; stripes of the, ii. 302. 
Zebus, humps of, i. 284. 
Zigzags, prevalence of, as ornaments, 
i. 233. 
Zincke, Mr., on European emigration 
to America, i. 179. 
Zootoai viviparu, sexual difference in 
the colour of, ii. 36. 
Zygainid^, coloratiou of the, i. 396. 
THE END. 
