394 ON ARCTOCEBUS CALABARENSIS 
the three other fingers, and also the shortest ; the fourth (or middle 
of the developed fingers) is the longest; and the fifth, or last, is 
longer than the third. The hands are each divided into two 
opposing portions—the thumb with the tubercle at its base being 
opposed to the other fingers with the tubercle-like index at their base, 
the thumb itself being opposed to the fourth, the middle or longest 
of the fingers. 
“ The posterior hands, or feet, are rather larger and stronger than 
the anterior ones, and are each divided into two opposing portions -- 
the one consisting of the thumb, with a large rounded fleshy tubercle 
projecting from the inner side of its base (as in the fore hand), and 
the other portion, formed of the remaining four fingers, the first 
phalanges of which are also conjoined, being covered by the integu- 
ments as in the hand. There is a comparatively smaller fleshy 
tubercle, somewhat like the undeveloped index finger of the fore 
hand, projecting from the outer side of their base, which is opposed 
to the tubercle at the base of the thumb. The nails of the thumb 
and fingers are thin, flat, and rounded or oval in form, like those of 
the fore hand, with the exception of that of the second finger, 
(counting the thumb as the first), which is narrow, convex, sharp- 
pointed, and claw-like, and extends nearly to the point of the third 
finger... The whole length of the free extremity of the finger is 
half an inch, including the claw-like nail, which measures rather less 
than a quarter of an inch.” 
I have quoted Dr. Smith’s clear description at length, because it 
applies, in almost every particular, to my own specimen, though 
there are some points of difference which I shall now proceed 
to note. 
I find a pale band running down the median line of the face from 
the brow to the end of the nose, where it divides and sends a short 
lateral branch along the ale of the latter ; otherwise the characters of 
the pelage are quite those given by Dr. Smith. 
I may remark in addition, however, that there are no vibrissa nor 
defined eyebrows. A patch of short dark brown hairs, with inter- 
spersed, almost black longer ones, grows upon the inner half of the 
upper eyelid; and two tufts of hair, o3 in. long, project horizon- 
tally, one from the point of the tragus, the other from the region of 
the antitragus, or lower part of the pinna of the ear. The inner 
surface of the ear is, for the most part, covered with fine short hairs. 
The pinna of the ear (fig. 1) is not flattened and directed outwards, 
but is curved, so that its posterior surface becomes convex, while its 
outer margin is bent forwards, so as to be placed midway between the 
