CLASSIFICATIOiN' OF THE SCIURIDyE. 



245 



hammer-head and lying obliquely and transversely, the shorter 

 right-hand branch projecting farther forwards than the longer 

 left-hand branch, This baculum is quite unlike that of any 

 other species of the Petauristidte examined. (Text-fig. 29, 

 F, G.) 



The baculum of an example of Peiaurista philipjyensis from 

 Kanara, in the British Museum, is a long, stout bone, gradually 



Text-fio-ure 29. 



A. Baculum of Peiaurista philippensis. from above. 



B. The same from the left side. 



C. Apex of the same from the front. 



D. Baculum of Peiaurista sp. ? from above. 



E. The same from the left side. 



P. Baculum of JBelomys tricJioiis, obliquelj- from behind. 

 G. The same from above. 



H. Baculum of ISocjlaucomys fimhriatus, from the left side. 

 I. The same from the right side. 

 K. The same from above. 



narrowing from the base to the slightly expanded and upturned 

 distal end, which, when viewed from the front, is seen to be 

 shaped rather like the widened spout of a jug, the lower rim of 

 the spout being evenly rounded. From the side this terminal 

 lamina has a rounded upper border, a rather deeply emarginate 

 and thickened distal border, and a nearly straight, obliquely 

 ascending, thickened posteidor border ending inferiorly in a small 

 Proc. Zool. Soc— 1923, No. XYII. 17 



