1864.) pRor. HUXLEY ON ARCTOCERUS CALABARENSIS, 317 
of the developed fingers) is the longest ; and the fifth, or last, is 
longer than the third. The hands are each divided into two op- 
posing portions—the thumb with the tubercle at its base being op- 
posed 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 flesh 
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 (count- 
ing 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 alee 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 vibrissze 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, 0°3 in. long, project horizontally, 
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 
front and the hinder boundary of the external ear. Hence the aper- 
ture of the external ear is directed forwards as much as outwards. 
The pinna has no distinct lobule; the tragus (¢) is very small; the 
helix (A) is represented only by the thin edge of the pinna ; the anti- 
helix (a. 4) is more distinct, and divided in front and above into two 
branches ; at its base, inferiorly, a small antitragus appears. The fossa 
innominata, which separates the helix and autihelix, is obsolete, except 
inferiorly, where it forms a deepish pit behind the antihelix. 
The two singular transverse ridges (a, 6), which lie above the 
