RESULTS FROM THE MAMMAL SURVEY. 413 



The different forms I recognize may be sorted as follows : — 



A. Bullee qnite small, little swollen. 



Incisors less thrown forward. 

 Upper molars series 6'0-6"2 mm. 

 Skull 38-40 mm. Tail end white 

 all roiind. Manipnr and Chin 

 Hills ... ... ... ... E. manipulus, sp. n. 



B. Bnlla3 large and much swollen. 



Incisors more thrown forward. 



Tail end dark above ... ... E. herdmorei, Bljih. 



a. Upper molar series 6-0 mm. Skull 



39 mm. N. Tenasserim ... E.h.mulhdus, subsp. n. 

 />. Molar series 6-5 mm. Mergui... U. h. h&rdmorei, Blj. 

 c. Molar series 6-8* mm. Skull 46 



mm. S.-E. Siam ... ... E. h. magnns, Kloss. 



The typical skull of E. herdmorei being broken, with the hwWse lost, 

 I have had to make an assumption about the size of its bullae. But 

 both for geographical reasons and on account of the size of the space 

 in the bone from which the bullge have fallen, it seems fairlj^ certain 

 that they were of the large type, as in the Muleyit and Siamese 

 races, not as in that further North in Manipur. 



Epimys manipulus, sp. n. 



Grey above, white to the bases of the hairs below. Hands and 

 feet white above, the latter sometimes browner proximally. Tail 

 with its terminal two-fifths to a half white all round, the proximal 

 portion being brown about and whitish below. 



Skull in general characters as in E. herdmorei, but the incisors 

 rather less thrown forward and the bullae conspicuously ^ smaller. 

 Molars small, as in the smallest-toothed race of E. herdmorei. ^ 



Dimensions of the type: — Head and body 182 mm.; tail 181 

 hindfoot 37 ; ear 24-5 ; weight 5 oz. Skull, greatest length 42 

 condylo-incisive length 40-5; zygomatic breadth 22; nasals 17-5 

 interorbital breadth 7 ; palatilar length 20 ; palatal foramina 8 

 upper molar series 6-0. 



Another fully adult skull measures only 39 mm. in greatest length. 



Jfa&.— Manipur and Chin Hills. Type from Kabaw Valley, 20 

 miles W. of Kindat, Upper Burma. Alt. 600'. 



Type.—Kdailt female. B.M. No. 16. 3. 26. 78. Original number 172. 

 Collected 30th January 1915 by J. M. D. Mackenzie, and given by 

 him to the Bombay Natural History Society. Presented to the 

 National Museum by the Society. About 40 specimens examined. 



This Upper Burma rat is readily distinguishable from all the 

 forms of E. herdmorei by its small bullae and white tail-tip. 



*Mr, Kloss appears to have measured the teeth on the alveoli. I always include 

 the crowns only, from the most anterior part of the enamel covered surface- 



