136 Ml-. O. Thomas on 



similarly diiectefl forwards. Head dark rafous-brown, inter- 

 ramia and throat dull drabby or rufous ; a tendency for an 

 ill-defined lateral line on the neck to be of this latter colour. 

 T:iil broadly grizzled with black and dull buffy. 



Skull strongly built, usually with peculiarly shortened 

 muzzle and widely expanded zygomata. Teeth stout and 

 heavy, often very much so, the tliickening of the inner lobe 

 of m^ at a maximum. 



Dimensions of the type : — 



Hind foot (dry) 81 mu). Skull : condylo-basal length 88; 

 zygomatic breadth 55; mnxilhuy footli-row 33; breadth 

 between outer corners of carnjissials 30 ; length of carnassial 

 on outer edge 8*3. 



Hub. Mountainous region of Eastern Sarawak, notably the 

 Biiram district. Type from Mt. Dalit. 



Ti/pe. Old male. B.M. no. 99. 12. 9. 26. Collected 17(h 

 December, 1896, and presented by Dr. Charles Hose. Four 

 specimens examined. 



The Bornean material in the Museum seems to indicate 

 clearly that two races of IJ. brachyurus occur there, the one 

 olivaceous blackish without warmer suffusion, and the other 

 more or less rufous or ochraceous. And, so far as exactly 

 labelled specimens are concerned, the former is a lowland 

 and the latter a mountain race. But far more specimens 

 with exact localities are needed before the res[)ective ranges 

 of the two forms can be made out. 



XI. — A neiv Genvs of Opos^um from Southern Patagonia. 

 By Oldfield Thomas. 



(PuLlislied by peimissioa of the Trustees of the British Museum.) 



Among some small manmials collected by Mr. T. H. Hall at 

 Cape Tres Puntas, on the east coast of Southern Patagonia, 

 in south latitude 47°, there occurs, most unexpectedly, a 

 small opossum, this locality being far to the south of any 

 hitherto recorded for the family, the previously known 

 southern limit having been the Island of Chiloe, 42°-43° S. 

 The collection was sent by Mr. Hall to the Perth Museum, 

 Western Australia, whence it has been transferred by ex- 

 change to the British Museum. 



The opossum is a small animal, externally very like the 

 Chilian opossum, Marmosa eUgans, but close examination 

 reveals so many differences from that as from other members 



