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 ^ths 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 Jth 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. Geoffvoyi is described by Beunett 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, 



