222 



MR, R. I. POCOCK ON THE 



baculum serves to connect those of T. vittatus and T, lokroides. 

 (Text-fig. 21, H.) 



^ The baculum of a specimen of Tomeutes miniaius from Bukit 

 Kutu, Sehmgore, has the shaft tolerably similar to that of 

 T. lohroides, but the blade is slightly shorter than the shaft and 

 much thinner, being concavely emarginate inferiorly so that 

 there is a larger space between its lower border and the subjacent 

 upper edge of the shaft. There are also a few bony spikes on 

 the inferior edge of the shaft at the base of the upturned distal 

 portion. The bone measures 7*5 mm. This species, Mr. Thomas 

 tells me, comes near T. vittahos in genera] characters ; but the 

 great differences in their bacu la j)reclude the view of close kinship 

 between the two species. (Text-fig. 21, K.) 



In a specimen of Tomeutes rohinsoni — a species akin, 

 Mr. Thomas tells me, to 2\ lowii—from Bukit Tangga, Negri 

 Sembilan, the baculum has the shaft short, stout, and strongly 

 curved, being very like that of T. miniattis but somewhat thicker 

 proximally, shorter, and without trace of the bony spicules. The 

 blade, too, is tolerably similar but shorter, with a lightly convex 

 upper edge, with a notch and tooth. The bone measures 6 mm. 

 (Text-fig. 21, I.) 



In a specimen of T. tahan (allied to T. tenuis), from Bukit Kutu, 

 Selangore, the shaft is relatively longer and thinner than in the 

 previously described species, except T. vittatus, and its inferior 

 angle, very obtuse, is near the middle of the lower surface 

 approximately beneath the point of the blade. The blade itself 

 is short and deep, with a long hinge, a lightly convex upper edge, 

 a strongly concave lower edge, and a narrow apex. The bone 

 measures 5 mm. Judging from the baculum alone this species 

 would be referred to Dremomys. (Text-fig. 21, L.) 



The main distinctive features of the bacula of the species of 

 Tomeutes above described may be summarised as follows : — 



a. Shaft comparatively long, about twice as long as blade, its lower edge 

 lightlj' convex, its apex projecting well beyond blade ; upper edge of 

 blade not higher than line tangential to upper proximal and distal 



ends of shaft vittatus. 



a'. Shaft comparatively short, much less than twice as long as blade, 



its lower edge strongly curved or geniculate, its apex only surpassing 



blade slightly ; upper edge of blade higher than line tangential to 



upper proximal and distal ends of shaft. 



5. Angle of lower edge of slender shaft set far back almost beneath 



point of blade, distal portion beyond bend inclined gradually 



upwards; hinge nearly as long as blade tahan. 



h'. Lower edge of stout shaft with pronounced angle in front of lower 

 end of hinge, distal portion beyond angle tipped steeply upwards; 

 hinge much shorter than blade. 

 c. Blade with apex not overlapping proximal end of shaft, its lower 



edge deeply and widely emarginate towards hinge ... miniatus, rohinsoni. 

 c'. Blade with apex overlapping proximal end of shaft, its lower 

 edge nearly straight up to small concave notch by hinge. 



loTcroides, hippurus. 



According to Thomas the following species belong to 

 Tomeutes: — phmjrei, Uavfordi, pygerythrus, janetfa, pryeri. 



