250 Journal of the F.M.S. Museums. [Vol. VI, 



white. The tail, which has [2 rings to the centimetre at its 

 middle, is dark brown throughout and practically naked save 

 for about 18 millimetres at the base, the hairs on the remainder 

 being invisible except through a glass. 



The skull, though smaller, is of the same general form as 

 that of P. melnnurus with the same extremely large, dilated, 

 kidney-shaped bullae but otherwise differs in the following 

 respects : — almost complete absence of parietal ridges with 

 entire lack of a marked angular projection at their commence- 

 ment ; interparietal broader; interpterygoid space parallel- 

 ^ided, not lyrate or horse-shoe shaped. 



The teeth are apparently similar: of the upper molars the 

 first has three longitudinal rows of triple cusps; the middle 

 molar has two central, three internal and a single external 

 cusp in contact with the lirst of the former (in both these teeth 

 the median longitudinal cusps are largest); and the somewhat 

 complicated posterior tooth has a single cusp at the anterior 

 outer angle, two on the curved inner side and one posteriorly. 



Of the lower molars the first has a small anterior cusp 

 followed by three transverse rows of two cusps, those of the 

 first row being as small as the front one; the middle tooth is 

 of Epimys type with two transverse rows qf two cusps; situated 

 mesially at the posterior edge of both these teeth is another 

 and much smaller cusp ; the last molar has two small cusps 

 anteriorly followed by a broad transverse ridge. 



There is a marked difference in size between the teeth of 

 Javan and Malay animals, and as the dimensions of the molars 

 are not prone to increase with age it is apparent that the latter 

 is a considerably smaller animal. 



Though the Selangor specimen has the basi-occipital 

 suture still open and the teeth scarcely showing signs of wear, 

 the cranium, while globose, is somewhat rugose and I think 

 the individual is sufficiently mature to illustrate the characters 

 of the Peninsular animal : therefore in view of the difference 

 of colour, size and skull characters I feel justified in separat- 

 ing Malayan animals from those of Java under the name of 



PiTHECHEIRUS MELANURUS PARVUS, Subsp. nOV., 



with characters as above. 



Dimensions: — collectors' external measurements: — head and 

 body, 122 (2og)*; tail, 140 (186); hindfoot without claws, 26 

 (with claws, 30); ear, 15(15)- Skull: greatest length, 34.7 

 (41); condylo-basilar length, 30; palatilar length, 15.7; 

 diastema, 8.7 (11) ; upper molar row, 7.3 (g) ; length of palatal 

 foramina, 6; greatest length of bulla, 8.8; median nasal length 

 7.5 ; zygomatic breadth, 17.4 (22). 



• Measurements in parentheses those of a Javanese example of P. melanurus, 

 (Jentinck op. cit. supra, p. 227). 



