\ 



RESULTS FROM THE MAMMAL SURVEY. 409 



Dimensions of the type, measiired in the flesh : — Head and body 

 210 mm. ; tail 293; hindfoot 47; ear 30. Skull, greatest length 

 56; condylo-incisive length 51-0 ; zygomatic breadth 25*3; nasals 

 22'7 ; interorbital breadth 8-3 ; breadth of brain case 2 1 • 3 ; palatilar 

 length 24; palatal foramina 8-2 ; upper molar series 9. 



Hah. of tijije. — Pashok, Darjiling, 3,500'. 



Type.—kdx\\t male. B. M. No. 16-3-25-97. Original number 543. 

 Collected 6th August 1915 by N. A. Baptista. Presented by the 

 Bombay Natural History Society. A second specimen obtained in 

 October. 



This rat is at once distinguishable from any of its allies in 

 British India by its conspicuously larger size. Its nearest relative is 

 E. vociferans of the Malay Peninsular, from which, as already 

 noted, it differs by its darker colour and the other details above 

 recorded. 



That two such distinct and striking new animals as Baonomys 

 millardi and Epimys luteri should be discovered in so com- 

 paratively well worked a region as Darjiling is most remarkable, 

 and reflects great credit on Mr. R. S. Lister by whose help the 

 Society's collector N. A. Baptista was able to form such a fine 

 series at Pashok, and also to Mr. H. Stevens who gave him so much 

 assistance at Gopaldhara. A full list of these collections will be 

 later given in Mr. Wroughton's " Reports." 



3. — On the lakge rats allied to Epimys bowersi. 



In Burma and ranging southwards to the northern parts of the 

 Malaj'' Peninsular there occur a number of large iron-grey rats 

 forming the " bowersi group " of Bonhote. 



Of these rats Mr. Mackenzie has sent from the Chin Hills a very 

 fine series, whose study enables me to clear up several points which 

 had been previously doubtful. 



Mr. Mackenzie's specimens prove to be readily separable into two 

 distinct species, a larger, the true hoicersi, with 2 — 2^8 mammas, 

 and a smaller with 3 — 2 = 10. 



A difference in the number of the mammse between Tenasserim 

 and Carin examples had already been noticed by me when working- 

 out Signor Pea's specimens in 1892, but the size difference in the 

 skulls was not observed, for skulls were comparatively little thought 

 of in those days, and the mammary character was not considered of 

 sufficient constancy to base specific distinction upon. 



Later on Mr. Miller described from Trong, in Lower Siam, a 

 species of this group as Mus ferreocanus, and the British Museum 

 owes to the authorities of the Federated Malay States Museums 

 examples representing this aniiiial, and fortunately showing the 

 number of the mammte, which proves to be 2 — 2=8, as in E. 

 berdmorei, not as in the smaller Burmese and Tenasserim species. 



