320 MR. OLD FIELD THOMAS ON MAMMALS 



any reason why it should be distinguished from the rest, especially as Jentink 

 subsequently informed me that its mammary formula was 1 — 2 = 6, and not, as 

 published, 0—2 = 4. 



Should the Snow Mountain Rat prove ultimately to be in any way distinguishable 

 from the true ringens of the Fly River, the name ratticolor will have to be used for it. 



15. f Stenomys klossi Thos. 



2 d , 2 $ . Camp 2, Utakwa R. 5600'. 



3 6 . Camp 11, Utakwa R. 8000'. 



Described Ann. & Mag. N. H. (8) xii. p. 207 (1913). No. 91 (B.M. no. 13. 6. 18. 83) 

 the type. 



This Mountain-Rat, which is named after Mr. C. B. Kloss, was the only mammal 

 obtained at the higher collecting-stations. The poverty in mammals of the hio-her 

 ground was a great disappointment to the members of the Expedition. 



S. klossi is nearly related to S. niobe, the smaller of the only two species oi Stenomtis 

 hitherto known. Both are natives of British New Guinea. 



Ueomts. 



The fine series of the genus TJromys obtained by the two Expeditions forms perhaps 

 the most valuable part of the results of their work. The members of this o-enus are 

 extraordinarily difficult to work out, on account both of their external and cranial 

 variability, the general likeness of all the species to each other, and the considerable 

 number of them that may be found in the same districts. 



In the regions explored by the Lorentz and the two British Expeditions there would 

 seem to be no less than eight species of this genus, two of them large, belongint^ to the 

 U. macropus group, and six of the smaller forms allied to U. hruijnii. 



The species called " short-tailed Pogonomys " in the reports on the Dutch Expeditions 

 are all really members of Uromys, Jentink not having distinguished the two genera. 

 The commonest species in the district, U. lorentzii, was described by Jentink as 

 Pogonomys lorentzii on a specimen obtained at the Resi Camp by Lorentz. The Noord 

 River animals that he determined, in his later report, as Pogonomys multiplicatus 

 are probably my TJromys scaphax. The original P. multiplicatus came from quite 

 a different part of New Guinea, and was based on so young a specimen that its true 

 identification will perhaps never be possible. 



16. f Ueomts nerd Thos. 

 5 $ . Camp 3, Utakwa R. 2500'. ' 



Described Ann. & Mag. N. H. (8) xii. p. 208 (1913). No. 67 (B.M.no. 13. 6. 18. 13) 

 the typ3. 



