On a new Rat /r>ni Teii'is,'<erini. A'2'> 



orif^inally placed it. The attempt made bv Milne- Edwards 

 and Filliol, and. comparatively rectntly, by Trouessart, t(; 

 include it in the Felithe or in a special family associated 

 uith the Fclidx' must bring about an extension of the 

 definition of that family or group, with the result that the 

 dctinition ceases to be of scientific value. It is significant 

 that no such definition was attempted. For ray part 1 quite 

 agree with Lonnberg that the cross-resemblances Cnjptu- 

 pructa exhibits toother families of iEluroids, coupled with 

 its own peculiarities, entitle it to rank as a family by itself; 

 and this family is susceptible of definition as precise as that 

 of the Felidae or Hyaenidae. 



XLIX. — A neio Nat from Tenasserim. 

 13y Oldfikld Thomas, 



(Published by permissiou of the Trustees of the British Museum.) 



Epimys ttnusteVy sp. n. 



Quite like E. cremo7-iventer, Miller, but much larger. The 

 fur similarly spiny, the colour bufi'y or ochraceous with 

 sharply defined under surface, and the tail similarly well 

 haired, uniformly brown. 



Skull conspicuously larger than that of cremoriventer^ 

 proportionally perhaps somewhat narrower. Supraorbital 

 ridges well developed, evenly curved, not forming marked 

 postorbital angles as in E. surifer. 



Dimensions of the type (measured on the spirit-speci- 

 men) : — 



Head and body 160 mm. ; tail 208 ; hind foot 33-3 ; 

 ear 24. 



Skull: greatest length 42"3 ; condylo-incisive length 37*7 ; 

 zygomatic breadth 18*8 ; nasals 1G"3 ; interorbital breadth 

 0'8 ; breadth across parietal ridges 15"4 ; palatilar length 

 17'8 ; palatal furamina 7 ; upjjer molar series 'o'h. 



Hah. Mount MuUyit, Tenasserim. Alt. 5000-6000'. 



Tijpe. Adult male. B.M. no. 88. 12. 1. r)3. Collected by 

 \j. Fea, and presented by the Marquis G. Doria. 



This is one of two species put by me under the erroneous 

 heading of Mus jerdonij Blytli, in my account of the Fea 

 collection, the otlier being a smaller foru) recently named bv 

 Mr. Miller Epimys gracilis, and closely allied to E. bulcit. 

 E. tenaster appears to be only nearly related to the Malayan 

 E. cremurivtnter, from which the dimensions given above will 

 readily distinguish it. 



