On the Angwantibo of Old Calabar. 183 
I subjoin details of the dentition of the Angwantibo ; and 
also some of its admeasurements. For the relative measure- 
ments of the Potto, corresponding also to those already de- 
scribed of the Angiudntibo, and showing their various differ- 
ences, see Bennett's account of the Genus Perodicticus, 
referred to already. 
Dentition. 
Upper Jaw :— - 
Incisors 2 • 2 = 4. Two together (in pairs), with interme- 
diate edentulous space, — 1st incisor the smallest, the 2d nearly 
twice as large as the first. 
Canines 1 — 1 = 2. Large and projecting downwards. The 
intermaxillary suture is described as being immediately in 
front of the corresponding teeth of the Potto ; these teeth are 
therefore undoubtedly canines, and when the mouth is shut, 
they pass immediately behind the small canines which pro- 
ject forwards alongside the incisors of the lower jaw. 
Molars 6 • 6 = 12. 
(False Molars, 3.) \st, smallest, conical ; with very small 
and slight indication of an internal conical tubercle : 2d, conical ; 
with small internal conical tubercle : 3<i, with external conical 
tubercle ; and smaller, shorter, internal tubercle. 
(True Molars, 3.) 4:th, with two external conical tubercles ; 
and two internal smaller and flatter tubercles : bth, two exter- 
nal conical tubercles ; and two internal, smaller and flatter 
ones : 6^/i, two external conical tubercles ; and one internal 
flattened and smaller tubercle. 
Lower Jaw : — 
Incisors 2 ' 2 = 4:. In pairs laid closely together, the pair 
appearing like one tooth, and all sloping forwards. 
Canines 1 • 1 = 2. Small, sloping forwards adjoining in- 
cisors, which they closely resemble. Each tooth, however, is 
slightly larger in size than a pair of the incisors. 
Molars 6^ = 12. 
(False, 3.) 1st, large, conical, projecting forwards and up- 
wards like a canine tooth in shape (the corresponding tooth 
in the Potto was formerly described as a canine tooth). When 
the teeth are closed, however, the canine of the upper jaw 
