INDEX OF SPECIES. 
Marsupialia, Mr. Owen on the classification of, page 
315. 
, on the osteology of, 379; of the skull, 
379; of the vertebral column, 394; of the tho- 
rax, 398; of the pectoral extremities, 399 ; of 
the pelvic extremities, 403. 
Mastacembelus armatus, Sykes, description of, 350. 
Meles Labradoria, Mr. Waterhouse’s description of 
the skull of, 343. 
Meriones, observations upon this genus, 135. 
Meriones opimus, observations upon, 136. 
apicalis, observations upon, 136. 
—— Gerbillus, Ruppell, observations upon, 137 ; 
description of, 142. 
Lybicus, observations upon, 136. 
musculus, observations upon, 136. 
robustus, Ruppell, observations upon, 137. 
Schlegelii, Smutz, observations upon, 137 ; 
description of, 143. 
Merluccius vulgaris, Cuv., notice of, 189. 
Microrhynchus, characters of this new genus, 40. 
Microrhynchus depressus, description of, 42. 
gibbosus, description of, 41. 
Mithrix denticulatus, description of, 54. 
nodosus, description of, 53. 
pygmeus, description of, 55. 
rostratus, description of, 51. 
Ursus, description of, 52. 
Motella tricirrata, Yarrell, notice of, 189. 
Mugillide, on the Madeiran fishes of this family, 184. 
Mugil cephalus, Penn., notice of, 184. 
Chelo, Cuv., notice of, 184. 
corrugatus, Lowe, description of, 184. 
labrosus, Risso, notice of, 184. 
Mullet, Striped Red, notice of, 175 ; the Thick-lipped 
Grey (Mugil Chelo), notice of, 184. 
Mullus imberbis, Linn., notice of, 173. 
Surmuletus, Linn., notice of, 175. 
Murenide, on the Madeiran fishes of this family, 
191; on the species of, inhabiting the Dukhun, 
377. 
Mureena, the, notice of, 192. 
Murena anatina, Lowe, description of, 192. 
Christinii, Risso, notice of, 192. 
Conger, Linn., notice of, 192. 
, Duck’s-bill, description of, 192. 
—— guttata, Riss. ?, description of, 192. 
Helena, Linn., notice of, 192. 
i 
417 
Murena unicolor, Cuv., description of, page 192. 
Mus Labradorius, Pennant, observations upon, 135. 
longipes, Pallas, observations upon, 135. 
meridianus, Pallas, observations upon, 135. 
Tamaricinus, Pallas, observations upon, 135. 
Mustelus levis, Flem., notice of, 194. 
Myliobatis Aquila, Cuv., notice of, 196. 
Myrmecobius, characters of, 149, 318; on the osteo- 
logy of, 379-408. 
Myrmecobius fasciatus, description of, 151; on the 
osteology of, 379-408. 
Mystus, B. Hamilt., observations upon this genus, 
375. 
Mystus Badgee, Sykes, description of, 376. 
Naja tripudians, Merrem, observations upon, 304. 
Naucrates ductor, Cuv. and Val., notice of, 183. 
Notidanus cinereus, Cuv., notice of, 194. 
griseus, Cuy., notice of, 194, 
Notopterus, Lacepéde, observations upon this genus, 
375. 
Nubian Giraffe, notes on the anatomy of, 217. 
Oblada melanura, Cuv. and Val., notice of, 178. 
Octodon, observations on this new genus, 75; cha- 
racters of, 80. 
Octodon Cumingii, description of, 81. 
Octopus, on the habits of, 111. 
Octopus semipalmatus, description of, 111 ; anatomy 
of, 112. 
Ocythoé Cranchii, Leach, observations upon, 114. 
Ophicephalus leucopunctatus, Sykes, description of, 
352. 
Ophidium, Mr. Thompson’s description of a new sub- 
genus of fishes allied to, 207. 
Opossums, characters of, 321; on the osteology of, 
379-408. 
Orang-Utans, on the osteology of, 165. 
Ostracion subrotundus, Artedi, notice of, 193. 
Othonia, characters of this new genus, 55. 
Othonia quinque-dentata, description of, 57. 
sex-dentata, description of, 56. 
Pagellus acarne, Cuv. and Val., notice of, 177. 
centrodontus, Cuv. and Val., notice of, 177. 
rostratus, Lowe, description of, 177. 
Pagrus lineatus, Flem., notice of, 178. 
vulgaris, Cuv. and Val., notice of, 177. 
Paper Nautilus, observations upon a specimen of, 113. 
Pelia, characters of this new genus, 44. 
Pelia pulchella, description of, 45. 
