47 
and smooth behind. The hinder horn was short, conical and sub- 
quadrangular ; it was 11 inches in length. 
Dr. Gray stated that the British Museum possesses a second speci- 
men of a front horn, of a similar curve and form, with a similarly 
worn front top, of a rather larger size. This formerly belonged to 
Sir Hans Sloane’s Collection ; so that this species, like R. s¢mus, must 
have been known to the older travellers. 
March 22, 1853. 
Dr. Gray, F.R.S., Vice-President, in the Chair. 
The following papers were read :— 
1. Description or A New Species or TETRAOGALLUS. 
By Joun Govuxp, F.R.S. 
Mr. Gould laid upon the table a complete series of all the known 
species of the genus Tetraogallus, viz. the 
Tetraogallus Caspius, inhabiting Astrabad, Ghilan, and other parts 
of Persia ; 
Tetraogallus Himalayensis, inhabiting the Himalaya mountains ; 
Tetraogallus Altaicus, inhabiting the Altai mountains ; 
and a fine new species, lately sent to the Honourable East India Com- 
pany, from Thibet, by Captain Strachey, which he described under 
the name of 
TETRAOGALLUS TIBETANUS. | 
Crown of the head, cheeks, back and sides of the neck dark slate- 
grey, washed with buff on the orbits ; ear-coverts buffy white ; chin, 
front of the throat and chest white; upper surface, wings and tail- 
coverts freckled buff, grey and black, the feathers of the middle of 
the back and the wing-coverts broadly edged with pale buff; rump 
and upper tail-coverts washed with rufous ; primaries greyish brown ; 
secondaries broadly edged and tipped with white ; breast crossed by 
a narrow band of grey, freckled with buff and blotched with black ; 
under surface white ; the feathers of the flanks and lower part of the 
abdomen narrowly but conspicuously margined with jet-black, form- 
ing stripes along those parts of the body ; under tail-coverts black, 
with a broad stripe of white down the centre; tail very dark brown, 
inclining to rufous at the tip; bill and feet orange-red. 
Total length about 15 inches ; bill, 14; wing, 94; tail, 5; tarsi, 25. 
In the collection of the Honourable Kast India Company. 
