MAMMALIA. 167 
yellowish-gray hue, with few of the black hairs. The fur on the belly is longer but thinner 
than that on the back, and its colour is between pale rufous and yellowish-gray. ‘The cheeks, 
throat, and inside of the thighs are very pale ash-gray, verging towards white. The buttocks 
and under surface of the tail have generally more or less of a rufous tinge. The fur 
throughout the body is shining pale ash-gray for the greater part of its length, the brown 
tints being confined to the tips. The black hairs which are intermixed, are longer than the 
others, and are of one colour their whole length. The tail is flat or depressed, nearly linear, 
and rounded at the end. It is less than one-fourth of the length of the body and head, and 
is clothed with hairs longer than the fur of the body, and capable of a distichicous arrange- 
‘ment. The upper surface of the tail is darker than the back, the central parts, when the 
hairs are spread out, being a mixture of black and rusty brown, in nearly equal proportions, 
ut not banded or spotted, being only clouded. The extremities of the hairs, and, conse- 
quently, the margin of the tail, have a rusty colour, becoming paler towards the tips, which 
are almost white. The hairs of the tail at its extremity are the longest, being an inch in 
length, but the tail is by no means bushy. 
There are four toes and a minute thumb on the fore-feet... The toes are covered above 
with a close smooth coat of hair. On the naked palms there are five callous tubercles, one 
small one at the root of the inner toe, a similar one at the root of the outer toe, and one a 
Tittle larger common to the two middle ones. There is a pretty large one adjoining to the 
thumb, and one nearly as large and of a conical form opposite to it. The first and third toe 
are of the same length, the middle one is the longest, and the outer one is the shortest and 
furthest back. The thumb has a very short joint, and is armed with a small convex obtuse 
claw. The claws of the toes are long and much compressed, their edges being in contact 
beneath, nearly to the tips, where they separate to form a narrow groove. Hind-feet with 
five toes. Sole naked, its heel alone being protected by hairs which grow on its sides and 
curve over it. It has four smooth tubercles, one of which is common to the middle and fourth 
toe, and the other three are proper to the inner, second, and outer toes. The toes are slender 
and distinct, a slight duplicature only of naked skin appearing at their bases when they are 
pulled apart. The three middle toes differ little in length, and arise together; the other two 
are considerably smaller, and have their origin further back. The claws are shorter than 
those of the fore-feet, though of similar shape, except that the edges are not in contact 
beneath. All the claws are dark brownish-black. 
DimENstons 
Of a recent full-grown specimen. 
Inches, Lines. Inches. Lines. 
‘Length of body and head Ph 8 Length from heel to tip of middle hind-claw 1 10 
' oe head. 3 7 * 7 4 - 5, Of middle hind-claw . - - 0 3) 
= body . al 4 5 of the cranium, from the end of the 
5 tail (vertebre) 2 0 nasal bone to the occipital ridge peut 104 
os tail, including fur . 3 3 >> of the nasal bones . ‘ 0 8 
a middle fore-claw . . 0) 6 | Distance between the orbits. in the scull . 0 AL 
The females are generally smaller than the males. 
