1864.] DR. J. E. GRAY ON WEST-AFRICAN MAMMALS. hy) 
the remaining quills white, largely tipped and broadly margined along 
the inner web with black ; remainder of the plumage, comprising the 
neck, under surface, upper and under tail-coverts, pure white ; bill, 
legs, and feet coral-red ; nails black. 
Total length 16 inches, bill 2 inches, wing 123 inches, tail 5 inches, 
tarsi 24 inches. 
Hab. Tibet. 
Remark. This fine and very distinct species belongs to that section 
of the Laride which comprises the well-known Black-headed Gull, 
C. ridibundus, but cannot be confounded with that or any other 
species, the broad black mark in the centre of its first two primaries, 
together with its larger size, serving at once to distinguish it. It was 
brought from Tibet by Major W. E. Hay, F.Z.S. 
7. Descriprion or A New MusTeELa From QuiTo. 
By Dr. J. E. Gray, F.R.S., ere. 
(Plate VIII.) 
Mr. Gould has transferred to the British Museum the skin of a 
small Mustela which he received from Quito, along with a new spe- 
cies of Humming-bird, which he has lately described. 
It is very distinct from any we have previously seen. It is about 
the size of the European Weasel (Mustela vulgaris). 
MUsTELA AUREOVENTRIS. (PI. VIII.) 
Dark brown; chin and side of the throat white ; throat, chest, 
inside of fore legs, and belly golden yellow ; whiskers black; tail 
rather tapering, as long as the body ; the soles of the hind feet hairy ; 
the pad of the toes bald, callous, hairy on the sides ; ears rounded, 
hairy. Length of body and head 6 inches, of tail 44 inches. 
Hab. Ecuador. 
8. Notes on somME MamMALiA, WITH THE DESCRIPTION OF A | 
New GouunpA, FRoM WESTERN Arrica. By Dr. J. E. 
Gray, F.R.S., erc. 
In the ‘Proceedings of the Zoological Society’ for 1862, p. 8, 
Mr. Andrew Murray has described a Bat from Old Calabar under 
the name of Sphyrocephalus labrosus. 
The British Museum has just received from Western Africa a 
young specimen of a Bat which evidently belongs to the same species ; 
and, as it differs in several particulars from the adult, I herewith send 
a short account of its peculiarities :— 
The wings of this specimen, like all young Bats, are not completely 
developed, the fingers being short and the bones soft and flexible. 
The bald disk at the end of the nose is by no means so much deve- 
