22 JOURNAL, NATURAL HIST. SOCIETY OF SIAM. Vol. I. 
markedly predominating, and with the longer hairs tipped with light 
brown. It is mat-like and of great length, some of the hairs baing as 
much as 12 inches long. There is a jet-black, dorsal crest reaching 
to the tail. Sides of neck and face black, upper surface of head the 
same, but with some reddish hairs intermixed. Throat reddish evey, 
lower lips, chin and inside of ears whitish. 
I have hunted Serow at various places in Siam from Lat. 15° 
N. above Lopburi to Lat. 11° 48’ N. below Koh Hlak in the Peninsula. 
Except in the case of one Serow, which I shot near Koh Hlak, the 
colouration of all the specimens seen by me was black on the upper 
parts of the body, interspersed with white hairs on the back—these 
becoming more numerous on the breast between the forelegs, along 
the belly and under the edges of the tail, which is thus sometimes 
fringed with white; from the knees and hocks downwards very light 
grey, or dirty white shading into grey on the front of the forelegs ; 
the muzzle not noticeably grey; no fawn or red hairs at all anywhere 
on the body or legs. The animal shot by me near Koh Hlak was 
coloured as above described, with the exception that the legs from 
midway between the elbow and knee joints, and midway between the 
stifle and hock joints downwards, were a reddish grey owing to the 
mixture of a preponderating number of red hairs with the white. 
From the descriptions I have given above I submit that there 
can be no doubt whatever that at least two distinct races of Serow 
inhabit Siam, the distinguishing marks being that one race has no . 
rufous colouration at all, while the other has a considerable amount of 
such colouration. I have never heard of the rufous variety occurring 
in Siam north of Latitude 12° 40’ N.; all the specimens I have seen cr 
heard of from the north of that line have had only black and white 
hairs in their pelts. The information at my disposal leads me to think 
that the Serow without any rufous colouration at all, being simply 
black and grey or white, with dirty white or grey legs, may bea 
sub-species which has not yet been described by anyone as a distinct 
race. From the description already given of tiar, it appears to be 
most closely allied to that animal, although the known habitat of thar 
is very far removed from Siam. 
The measurements of a fullgrown female Serow which I shot 
near Na Yang, about Lat. 12° 45’ N., Long. 99° 55' E., in Petcha- 
buri district in 1910, were, from tip of nose—not much stretched 
r 
