On the Angwantibo of Old Calabar. 179 
inches. The Eyes are rather full and large, the opening of 
the lids measuring J an inch in length ; the distance between 
the eyes at their anterior angles is J an inch. They are rather 
prominent forwards, and very slightly lateral. The Ears are 
erect and patulous, rather large, and rounded in outline, with- 
out emarginations, measuring about fths of an inch across 
from before backwards, and also from above downwards ; 
they seem to be naked internally, and slightly covered with 
short hair externally. In this specimen they are nearly 
naked, especially on the inner surface. There are two 
transverse, abrupt, parallel, projecting ridges of cartilage, 
each measuring i^^hs of an inch in length, in the free 
cartilage above the external opening of the meatus. The 
external openings of the Nostrils are rather lateral, and 
are sinuous, curved upwards and inwards toward the mesian 
line of the full and rounded snout ; and there is a groove 
between them, running down to the front of the upper lip. 
The Tongue is long, and rounded in front, rather rough, 
being covered with small papillae. Immediately below the 
tongue is the projecting lamina, covered with a horny cuticle, 
and resembling a smaller, bird-like tongue, which springs 
from the frcnum and projects forwards, about |ths of an 
inch in length. It is free at its edges, and at its point, 
which projects about Jlh of an inch ; reaching to within 
Jth of an inch of the point of the tongue itself. This horny 
lamina measures about Jth of an inch in breadth across its 
root or base, and about Jih of an inch across its free or front 
exlvemity, which is divided into nine sharp terminal points 
or filaments. The P. Geoffroyi is described by Bennett as 
having this horny lamina terminating in about six filaments. 
It is difficult to understand the use of this strange supple- 
mentary horny, bird-like tongue, or expansion of the frenum, 
with its pointed terminal filaments, in an animal stated to feed 
on fruit ; it would seem rather to be some sort of additional 
assistance towards capturing or killing an insect prey ; but, 
in any view, its use seems to be very obscure. Below the 
tongue and this supplementary organ, the mucous membrane 
lining the floor of the mouth has a slightly free margin pro- 
jecting along the sides of the gums of the lower jaw ; in which, 
