Descriptions of East Asiatic Mammals 157 
upper lip, chin, and throat are whitish. The length of the head 
and body is about 2 feet 8 inches, of the tail 20 inches. The range 
of this Otter includes the whole of the Malay Peninsula, Siam, 
Annam, and Cochin-China. It occurs also on Sumatra, where it 
was first discovered, and on Borneo. 
The Smooth Otter, Lutrogale perspicillata, differs from the 
True Otters by the higher, more massive head and heavier 
crushing teeth. The claws are fully developed, as in Lutra. Prob- 
ably these characters will be found insufficient to maintain for 
Lutrogale higher than subgeneric rank. This is a large species 
characterized by its very smooth, sleek coat. The color above 
varies from dark brown to slightly reddish brown, lighter be- 
neath. The upper lip, cheek to the eye and ear, sides of neck, 
chin, and throat are whitish. Two races occur, the typical one 
in Burma, Assam, and the Malay Peninsula and L. p. sindica 
in western India. The length of the head and body varies from 
26 to 29 inches, of the tail 17 to 18 inches. The hind foot 
measures 5% inches. 
The Small-clawed or "Clawless" Otters, Amblyonyx, differ 
from the two previously mentioned genera chiefly by the great 
reduction of the size of the claws, which are so short as to be 
much exceeded by the pads. In the young the claws are larger. 
In Amblyonyx the tiny first upper premolar is often absent but 
the crushing molar is proportionately even larger than in Lutra 
and Lutrogale. 
There is one species, A. cinerea, typically of Java, but also 
found in Borneo, Sumatra, and the Malay Peninsula, with two 
other continental races, A. c. concolor, of Assam, upper Burma, 
Tonkin, Annam, and southern China and A. c. nirnai of India. 
The color is dark brown, sometimes with a reddish tinge. The 
grayish wash on the tips of the hairs, for which the name cinerea 
was given, is rarely seen. The underside is a paler brown or 
gray-brown, and the edge of the upper lips, the chin, cheeks, 
sides of the neck, and the throat are grayish white. The length 
of head and body is about 22 inches. The food is reputed to con- 
