bo 
— 
[=r] 
AN APPEAL FOR LANGURS. 
The following appeal is made to all those interested in the 
Mammalian fauna of Siam, for specimens, and notes on the habits, of 
the Langur Monkeys. The Siamese Langurs are very little known 
and the material at present to hand is not sufficient to permit of a 
thorough understanding of the relations existing between the various 
forms. ; 
In the preparation of skins it should be remembered. that the 
measurements and sex of each animal should be recorded on the label. 
The usual body measurements are (1) from the tip of the nose to the 
base of the tail ; (2) from the base of the tail to the tip of same—not 
including any terminal tuft of hairs; and (38) the length of the hind 
foot. 
The skulls of the various specimens should all be labelled so 
that they can be identified with the skins that belong to them ; for this 
purpose the collector will find it easiest to number his specimens and 
never to repeat the same numbers in any subsequent collection. The 
skulls are best if sent home with the dried meat still on, as this 
prevents damage and loss of teeth. The localities of the specimens 
should be recorded on the label in such a manner that those less 
intimately acquainted with the local geography may be able to locate 
the various places. The altitude and date of capture are also items 
‘of considerable importance which should be entered upon the skin 
label. 
As far as possible specimens of both sexes should be obtained, 
together with young individuals—so that any sexual or juvenile 
pelage-differences may be observed. 
It is hoped shortly to publish an extensive monograph on the 
subject of the Langur Monkeys. 
The Indian groups are now, thanks to the Bombay Natural 
History Society’: mamma! survey, well worked out; to bring our 
knowledge concerning the Siamese forms up to the same standard we 
require a much more complete series than is now available for 
examination. 
GUY DOLLMAN, 
British Museum ( Natural History ). 
October 23, 1914. 
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