:o2 Journal of the F.M.S. Museums. [Vol. VII, 



on Semnopithecus buku, Martin, Ann. and Mag. Nat. Hist. 141. 

 ii p. 435 (1838) itself derived from Raffles' Kra Buku (Trans. 

 Linn. Soc. xiii. p. 247 (1821) which is quite a passable des- 

 cription of the animal. 



Lariscus [nsignis fornicattjs, subsp. HOC. 



lyre: — Adult female (skin and skull) No. 876/15, Federated 

 Mala) States Museums, collected at Juara Bay, East Side of 

 Pulau Tioman, Pahang, on July 1st. 1915. by H. C. Robinson. 

 Original No. 6698. 



Characters : — Differing from other forms of Lariscus insignis 

 (Cuv.i, m its somewhat slighter skull, the nasals broadening 

 less anteriorly and by having the rostrum decidedly more 

 arched laterally, i.e. the nasals meet it an angle instead of 

 lying practically in the same plane. 



Colour: — As in the more southern specimens ol Lariscus 

 insignis jalorensis, being exactly matched by individuals from 

 the Triang District, Western Pahang and having the thighs 

 richly washed with rufous buff more so than in northern 

 specimens, but not approaching in richness of tint above, the 

 Singapore and Johore form. L. i. meiidionalis, Robinson & 

 Kloss. Area between the black back stripes, somewhat colder 

 in tint than the resl of the upper surface. 



.Skull: — That of a typical Lariscus, though with the regularly 

 curved outline somewhat flattened in the region of the frontal?. 

 Nasals less splayed anteriorly and decidedly arched. Rostrum 

 generally more slenderly built. Bullae rather less convergent 

 than in the peninsular form so that the basioccipital is more 

 regularly quadrate in shape. The teeth are rather small but 

 call for no special comment. 



Dimensions of the tvpe (measured in the flesh). Head 

 and bodv, 171 (180 1 ) : tail, 112 (100); Hindfoot, 44 1431; ear. 

 18 (16) mm. 



Cranial measurements. Total length, 48.8 (48.2) ; condylo- 

 basilar length. 38.0(36.9); zygomatic breadth 27.1 (26.8); cranial 

 breadth, 20.0 1,20.21: greatest length of nasals, 15.6 (15.8): 

 diastema, 12.3 (12. 1); upper molar row including pml 8.9 

 (8.9); least distance from tips of nasals to lachrymal notch. 

 21.0 (21.01 mm. 



Specimens examined: — Four, the type, and an adult and 

 two somewhat immature males all from the typical locality. 



Remarks: — Though only slightly differentiated from the 

 mainland race, this form appears sufficiently distinct to merit 

 a name. In colour it is intermediate between L. i. jalorensis, 

 from the mainland and L. i. meridiona lis from Singapore and 

 the southern part of Johore. The characters of the nasals 

 however separate it from both these forms. 



(1) Measurements in parentheses are those of an adult male from the 

 samelocaHtv FM.S No 623/16 



