67 
Ophicephalus leucopunctatus, ii. 352. 
maulius, li. 352. 
Ophidium, on a new subgenus of fishes, allied to, 
ii. 207-212. 
brevibarbe, vi. 392. 
—— imberbe, ii. 210. 
Ophioscion typicus, vi. 383, 428. 
Ophiurus breviceps, vi. 396. 
boro, vi. 396. 
—- triserialis, vi. 396. 
Opilis auripennis, i. 95, 110. 
Opisthocomus cristatus, on the myology of, ix: 353- 
370. 
, caudal muscles of, ix. 360. 
—— ——, muscles of the cubit of, ix. 358. 
—— ——,, muscles of the leg of, ix. 361. 
, muscles on the superior border of the 
radius of, ix. 359. 
, pectoralis magnus of, ix. 354. 
—— ——,, the ventral muscles of the tail of, ix. 
360. 
Opossums, on the osteology of, ii. 379-408. 
Orangs, osteological contributions to the natural 
history of the, ii. 165-172; iv. 75-88, 89-116, 
165-178. 
Orang Utan and Chimpanzee, on the osteology of, 
i, 343-379. 
Orbicula cumingii, i. 143, 144, 162. 
lamellosa, i. 142, 143, 144, 153, 162. 
strigata, i. 143, 144, 162. 
striata, i. 143. 
Orca, vi. 24, 98, 114, 115, 330, 361, 362, 365. 
gladiator, viii. 20, 237. 
, vertebral formula of, vi. 349. 
Orcus amadis, ix, 564. 
Oreynus alalonga, iii. 4. 
Oreophasis derbyanus, vy. 170. 
Oreus acteus, ix. 548. 
elpenor, ix. 554. 
—— licastus, ix. 539. 
porcus, ix. 561, 
thorates, ix. 540. 
Orgya luctuosa, ix. 193. 
Oriole, skull of Golden, x. 290, 
Oriolus acrorhynchus, ix. 185, 186. 
flavus, ix. 206. 
formosus, ix. 186, 
Oriolus furcatus, ix. 181. 
galbula, viii. 60, 112 ; ix. 186; x. 312, 314. 
, skull of, x. 290. 
hippocrepis, viii. 60. 
—— horsfieldii, viii. 60. 
indicus, viii. 60. 
kundoo, viii. 113. 
lineatus, ix. 224, 
melanocephalus, ix. 186. 
monachus, vil. 325. 
ocellatus, ix. 224, 
—— philippensis, ix. 186, 250. 
ruber, ix. 206. 
sinensis, viii. 78. 
Orneus enopion, ix. 622. 
Ornithichnites giganteus, iii. 265, 
tuberosus, iii. 267. 
Ornithorhynchus paradoxus, on the natural history 
and habits of, i. 229-258. 
, on the young of, i. 221-229. 
Orpheus melanotis, ix. 471. 
parvulus, ix. 472. 
trifasciatus, ix. 471. 
Orthorhynchus minimus, i. 193. 
Orthotomus castaneiceps, ix. 195, 250, 
derbianus, ix. 195, 250. 
Ortygis ocellata, ix. 224, 
Ortygometra cinerea, viii. 94; ix. 230, 251. 
eurizona, ix. 231. 
ocularis, ix. 231, 
quadristrigata, viii. 94. 
Ortygospiza atricollis, vii. 325. 
fuscocrissa, vii. 325. 
polyzona, Vil. 325, 
Oryba robusta, ix. 605. 
Oryx capensis, ii. 213. 
Oryzoborus crassirostris, ix, 485, 
torridus, ix. 485. 
Osmotreron aromatica, ix. 211. 
axillaris, ix. 211, 251. 
batilda, ix. 214, 
bicineta, viii. 114. 
griseicauda, vill. 82. 
— phayrei, ix. 212. 
vernans, viii. 81, 113; ix, 210, 251. 
Osphranter robustus, ix. 425. 
Osteolemus tetraspes, yi. 153, 
