756 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxiv. 
those bordering it barely reach a length of 50 mm. The crest, how- 
ever, owes its distinctness to the greater crowding of the bristles of 
which it is composed, as compared with those of the surrounding 
parts. As in Sm andamanensls, the skin is plainly visible through its 
scant covering of hair everywhere except in the region occupied b}^ 
the mane and crest. The cheeks are more hairy than in Sus anda- 
manensis. The tail is hair}' throughout except at tip. At base the 
hairs, which are much softer than the bristles of the back, are rather 
inconspicuous, but near middle they increase in number and in length, 
and form a straggling brush, the longest hairs of which are 150 mm. 
long. 
Color'. — The color is Idack throughout, with a faint l)rownish wash 
on dorsal crest. Hoofs rather dark horn color. In the type the 
hind feet are albinistic between hoof and hock, the light color involv- 
ing the hoofs as well as the hair. 
Skull. — The skull of Sus nicohcwleus^ though distinctly larger than 
that of S. midatiianerisis., shows no approach to the dimensions of that 
of S. cristatus. In form it differs from the skull of Sus andamanensis 
chiefly in the greater angle formed by the surface of the forehead with 
that of the rostrum, and in the larger, more inflated audital bullse. 
The zygomatic arch as a whole is more heavily built than in Sus 
andamanensis., and its horizontal surface is broader posteriorly. 
As compared with the skull of Sus cristatus from Tenasserim, that 
of S. nicoharicus shows numerous differences in form. Most conspic- 
uous among these are the relatively shorter rostrum and the ver}'^ dis- 
tinct angle in the facial proflle at posterior extremity of nasals. This 
angle is difficult to measure, but it is approximately 8^ in Sus crista- 
tus, and 18'-' in S. nicoharicus. The audital buihe appear to be rela- 
tively larger than in the average of Sus cristatus^ but this character is 
probabl}' not constant. 
Teeth. — The teeth are slightly larger in proportion to the size of the 
skull than in Sus andamanensis., but otherwise I can detect no differ- 
ences. They also agree in all essential characters with those of Sus 
cristatus. 
Measurements. — External measurements of type: Total length, 1,190 
mm.; head and bod}^ 1,000; tail, 190; height at shoulder, 520; hind 
foot (hoof included), 185. 
Cranial measurements of adult male considerably older than type 
(No. 112011, U.S.N.M.): Occipito-nasal length, 280 (256) mm.;^ basal 
length, 255 (220); basilar length, 245(215); length of nasals, 133(123); 
width of both nasals together posteriorly, -lO (25); median length of 
bony palate, 175 (153); width of bony palate at middle of second molar, 
31 (27); distance between tips of postorbital processes, 92 (81); least 
' Measurements in parenthesis are those of the shghtly older specimen of Sus 
andamanensis. 
