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 Angwantibo, 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.) 1st, smallest, conical ; with very small 

 and slight indication of an internal conical tubercle: 2d, conical ; 

 with small internal conical tubercle : 3d, 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 : 5th, two exter- 

 nal conical tubercles ; and two internal, smaller and flatter 

 ones : 6th, 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 



