XIII. ON THREE NEW RACES OF MALAYAN 



MAMMALS. 



Bj II. C. Robinson, C.M.Z.S. 



NYCTIC] BUS COUi ANG [NSULARIS, SUbsp. UOV. 



Type: — Old male (skin and skull) No. 963/15, Federated 

 Malay States Museums, collected at Sungei Nipa, south end 

 of Pulau Tioman, Pahang, on July 19th. 1915, by H. C. 

 Robinson. 



Characters: Ulied to the mainland form. .V. c. bitkit 

 (Martin), but separated from that by the indistinctness of 

 the facial markings, the absence of any vertebral streak and 

 the general rufous colouring. Skull with the temporal ridges 

 not meeting; two pairs of upper incisors. 



' 1 our: — Above ochraceous tawny, considerably paler 



beneath ; head and face silvery, the eyes surrounded by a broad 



ring of sienna brown, extended as a stripe from each eye 



on the temple; bands and feet paler and more 



Bases of the fur above and below pale grey. 



Skull: Bullae and basal region of skull rather more 

 1 than in N. c. 1'iikit; temporal ridges separated by 

 about 8 mm. Incisors two pairs in the upper jaw. 



Measurements: — Head and body (measured in the flesh) 

 265; hindfoot 53 : ear 14 mm. 



Cranial measurements: total length, 60.0 ; basal length, 

 (.9.9 ; orbital breadth. 37.3: greatest width of skull, 40.1; 

 cranial breadth, 29.2; mastoid breadth 37.1 ; front of canine 

 to back of last upper molar, 21.5 mm. 



Remarks: — The colour of this race sufficiently separates it 

 From V. c. buku while the absence of the vertebra] stripe 

 differentiates it from A", c. natunae, which, however, is 

 somewhat imperfectly known. 



It appears doubtful if the characters of the temporal 

 ridges relied on by Lyon to separate the various rates of the 

 Slow Lemur can really be trusted to do so. In the present 

 specimen however it seems certain that they would never meet, 

 which would ally the Tioman race to those from Borneo and 

 Banka which have only a single pair of incisors in the upper 

 jaw whereas this one has two pairs. 



The Slow Lemur is apparently rare in Tioman and is 

 unknown to the majority of the inhabitants. Our spi imi n 



was obtained in felling a pat h ol heavy jungle at thi th 



end of the island. 



Incidently it may be noted that the proper name for the 

 Malayan Slow Lemur now generally known as .V. c. 

 malaiamts, (Anderson), is Nyclicebta c. buku (Martin) founded 



Sept , 1917. 2 



