1917.] H.C.Robinson: Races of Malayan Mammals. 103 



TOMEUTES rENUIS TIOMANICUS, Sltbsp. nov. 



I ype :— Adult male (skin and skull) No. 728 15, Federated 

 Malay States Museums collected at Juara Bay, East side of 

 Fulau Tioman, Pahang, on June 23rd. 1915, by H. C. Robinson. 

 Original No. 6580. 



Characters: — A dull form of T. tennis, more allied to the 

 northern race I. tenuis snrdus (Miller) than to the bnghter 

 typical form from the southern two thirds of the Peninsula 

 and Singapore Id.. [T. tenuis tenuis (Horsf.)). Differing from 

 T. tenuis sordidus (Kloss) from Great Redang Island, in the 

 greater amount of black on the tail and from T. t. snrdus in 

 the more olivaceous, less ochraceous ground colour of the 

 upper surface and in the reduction of the white tips to the 

 hairs of the tail. 



Colour: — Above an uniform grizzle of black and dull 

 olivaceous buff, shoulders, thighs, ears more ochraceous, feet 

 and hinds grizzled blackish and ochreous buff not nearly so 

 bright as in T. tenuis tenuis from Singapore. Tail above 

 white, bases of the hairs ochraceous buff, less bright than in the 

 mainland races but much brighter than in the form from 

 Great Redang Id., median area clear black, with a narrow- 

 white tip. Pencil almost uniform black. Base of tail beneath 

 and scrotal region buffy. Beneath whitish with a strong 

 cream tint, the bases of the hairs except on the chin, throat and 

 median line broadly grey. Orbital ring, -ides of the face and 

 muzzle buffy ochraceous, the two latter more or less grizzled 

 with black. A clear buffy patch at the base of the vibrissae. 



Skull and Teeth : — The skull and teeth show practically no 

 differences from the two mainland representatives and are not 

 reduced in size. The bullae are perhaps a little less globose 

 and slightly smaller and the constrictions which are very 

 noticeable in the mainland specimens are much less pro- 

 nounced. The zygomatic arches are a little heavier. 



From the Great Redang, T. t. sordidus, the Tioman 

 animal differs in larger size and heavier and deeper rostrum. 

 The regularity of the maxillary nasal suture which is given by 

 Kloss as the only distinguishing cranial feature of bis form 

 does not appear to be reliable as it is not constantly present in 

 all the Redang specimens while it occurs in at least 15 per 

 cent, of specimens from othei sources. 



Measurements: — Collector's external measurements of type : 

 head and body, 125 (136) ;* tail, 107 (109) ; hindfoot, 31 (30.5) '. 

 ear, 13 (13) mm. 



Cranial measurements: greatest length. 37.1 (35.2); 

 condylobasilar length. 30.8 interorbital br idth, 12.2 



1 1 2.()i : palatilar length, 15.9; diastema, 8.2; cranial I 

 1 n.i : zygomatic breadth, 22.1 121.71 maxillary tooth row, 6.9 : 

 median length of nasals. 11.1 nun. 



Measurements in parentheses an I 

 No 1 j ^/i 3 collected on Kao Nawn 

 14th 191 3 



