452 
ORYX. 
INDEX. 
PALLAS. 
differences in the stridulant organs 
of, i. 383. 
Oryx leucoryx , use of the horns of, ii. 
251, 263.' 
Osphrantcr rufus, sexual difference in 
the colour of, ii. 286. 
Ostrich, African, sexes and incuba- 
tion of the, ii. 205. 
Ostriches, stripes of young, ii. 184. 
Qtw'ia jubata , mane of the male, ii. 
267. 
Otaria nigresccns, difference in the 
coloration of the sexes of, ii. 287. 
Otis bengalensiSj love-antics of the 
male, ii. 68. 
Otis tarda , polygamous, i. 269; throat- 
pouch of the male, ii. 58. 
Ouzel, ring-, colours and nidifieation 
of the, ii. 179. 
Ouzel, water-, colours and nidifica- 
tion of the, ii. 170. 
Ovibos moschatus , horns of, ii. 247. 
Ovipositor of insects, i. 254. 
Otm cycloceros , mode of fighting of, 
ii. 249. 
Ovule of man, i. 14. 
Owen, Prof., on the Corpora Wolffiana, 
i. 16; on the great toe in man, i. 
1 6 ; on the nictitating membrane 
and semilunar fold, i. 23; on the 
development of the posterior mo- 
lars in different races of man, i. 26 ; 
on the length of the ccecum ia the 
Koala, i. 27 ; on the coccygeal ver- 
tebrae, i. 29 ; on rudimentary struc- 
tures belonging to the reproductive 
system, i. 31; on abnormal condi- 
tions of the human uterus, i. 123 ; 
on the number of digits in the 
Ichthyopterygia, i. 125; on the 
canine teeth in man, i. 126 ; on 
the walking of the chimpanzee and 
orang, i. 139 ; ou the mastoid pro- 
cesses in the higher apes, i. 143; 
on the hairiness of elephants in 
elevated districts, i. 149 ; on the 
caudal vertebrae of monkeys, i. 
150 ; classification of mammalia, 
i. 187 ; on the hair in monkeys, i. 
194 ; on the piscine affinities of the 
Ichthyosaurians, i. 204; on poly- 
gamy and monogamy among the 
•antelopes, i. 267 ; on the horns of 
Antilocapra americana, i. 289 ; on 
the musky odour of crocodiles 
during the breeding season, ii. 29 ; 
on the scent-glands of snakes, ii« 
30; on the Dugong, Cachalot and 
Ornithorhynchus , ii. 242 ; on the 
autlers of the red deer, ii. 252 ; on 
the dentition of the camelidse, ii* 
257 ; on the tusks of the Mam- 
moth, ii. 258 ; on the horns of 
the Irish elk, ii. 259 ; ou the voice 
in the giraffe, porcupine, and stag, 
ii. 274; on the laryngeal sac of 
the gorilla and orang, ii. 276 ; on 
the odoriferous glands of mammals, 
ii. 279, 280; on the effects of emas- 
culation on the vocal organs of 
men, ii. 330; on the voice of Jlylo - 
bates agiliSy ii. 332; on American 
monogamous monkeys, ii., 362. 
Owls, white, new mates found by, ii* 
105. 
Oxynotas , difference of the females of 
two species of, ii. 193. 
P. 
Pachyderm at a, i. 268, 
PAGET, on the abnormal develop- 
ment of hairs in man, i. 25 ; on 
the thickness of the skin on the 
soles of the feet of infants, i. 118* 
Painting, i. 232. 
Palmmon, chela* of a species of, i. 331- 
Palmornis, sexual differences of colour 
in, ii. 231 * 
Palma mis javanicus , colour of beak 
of, ii. 179. 
Palmornis rosa, young of, ii. 188. 
Palamedea cornuta , spurs on the wing 5 
ii. 47. 
Paleolithic period, i. 183. 
Palestine, habits of the chaffinch in* 
i. 307, 
Pallas, on the perfection of f^ e 
seuses in the Mongolians, i. 119 » 011 
the want of connexion between cli- 
mate and the colour of the skin, *• 
241 ; on tiie polygamous habits ot 
Antilope Saiga , i. 267 ; on flj e 
lighter colour of horses and cattie 
in winter in Siberia, i. 282 ; on tk e 
tusks of the musk-deer, ii- 25 » 
258; on the odoriferous glands 0 
mammals, ii. 279 ; on the odorife* 
