8o Lloyd's natural history. 



also very large, and produced downward, inward, and back- 

 ward, even more than in the genus Indris. The naviculare 

 bone of the ankle {tarsus) is relatively short, thus differing 

 from the same region in Microcebiis and in Galago ; the carpus 

 (or wrist) has no central {os centrak) bone. 



In Hapalemur the teeth are of the normal Lemurine num- 

 ber, viz., 36 ; but the dentition as a whole is peculiar and 

 characteristic. Each series of teeth is very uniform and equal, 

 and those anterior to the molars are serrated. In the upper 

 jaw the incisors are very small, sub-equal, and situated close 

 together, the posterior tooth on each side being (when the skull 

 is viewed from the side) internal to and touching the canines. 

 The canines are small, and the gap between them and the 

 anterior pre-molar is very small. The anterior pre-molar is 

 slightly taller vertically than its median fellow, and stands 

 close up to it without an interval ; it has one main (and some- 

 times one rudimentary) outer cusp ; the posterior pre-molar, 

 which closely resembles a molar, and is often the largest tooth 

 in the jaw, having one inner cusp united by ridges to its two 

 outer cusps. The molar teeth are sub-equal to the hindmost 

 pre-molar, and have one front inner and two outer cusps, with- 

 out an oblique ridge between them, and also a well-developed 

 cingulum, cusped externally. Of the lower teeth, the anterior 

 and median pre-molars are set obliquely, the median having 

 three outer and two inner cusps (the two inner being united to 

 the two hind outer by ridges). The posterior pre-molar is 

 quite molariform, and, with the molars, presents three outer and 

 two (or three) inner cusps, of which the two inner are united 

 by ridges to the outer hind cusps, while transverse ridges unite 

 the main outer and inner cusps together. The molars are 

 cingulate towards the outside. 



