392 MR. C. BODEN KLOSS ON 
rufous and white throat patch, broadest posteriorly, continuous with 
the white of the lips and with it surrounding a black chin-patch. 
Limbs black or blackish brown to the knees and hocks, below 
which they are variable in colour ; a considerable amount of rufous 
present, and always the back of pasterns and the hair surrounding 
the upper digits rufous ; sometimes the shanks are completely rufous, 
sometimes rufous in patches, and sometimes mingled rufous and 
black. 
1 3 imm., 1 2 juv. Koh Lak, S. W. Siam. 11th Nov., 1916. 
Nos. 2413,4/CBK. Other specimens :—an example from Koh Lak 
shot by Mr. T. 8S. Butler (vide Irwin, Journ, Nat. Hist. Soc. Siam, I, 
p. 21); a female from near Si-sa-wad, Quaa Yai River, Western 
Siam, shot by Mr. K. G. Gairdner ( vide Gairdner, ibid, p. 254 ). 
Both in the British Museum. 
The typical locality may be taken as Kok Lak though this is 
probably nearly the extreme southern limit of the range. The 
form apparently extends north to meet C. s. milne-edwardsi, at 
least as far as the Shan States, and it also seems to inhabit Pegu. 
I deliberately refrain from selecting a type in this instance, 
as my experience of serows is that they exhibit so considerable an 
amount of individual variation that a single example may give a 
false idea of the characters of a race. As I am going into the 
subject of Siamese and Malayan serows at some length in a paper 
for this Journal, I shall not deal with the present form in further 
detail here; the variation, however, is probably greater than 
suggested above. 
I am by no means certain that the various recognised 
serows are all subspecies of swmatraensis, but I prefer to regard 
them as such at present, and to consider that the inosculation which 
to some extent occurs, is due to irregular gradation caused by 
individual variation, and also perhaps to wandering _ habits. 
Serows are not lowland animals, and when they leave a hill for 
the plains, as they sometimes do, and not return to it, it 
inay be necessary for them to travel considerable distances before 
they find another suitable home. This may be the explanation of 
JOURN, NAT. HIST. SOC, SIAM, 
