56 MR. C. BODEN KLOSS ON 



34. Epimys rattus eangensis, sub.sp. n. 



Type. Adult female (skin and skull), No. 1669/C.B.K. 

 B.M. No. 15.11.4.208. Collected on Koh Rang Id., 22nd 

 December, 1914. 



Diagnosis. — Closely resembles the adjacent mainland noi^mal 

 foi'm of E. rattus, but with the pelage a little coarser. Skull 

 broader throughout — rostrum, palate, interpteiygoid space, basi- 

 occipital and zygomata — but with smaller palatal foi'amina, which 

 do not reach a line joining tlie anterior ends of the molar rows. 

 Nasals shorter and more trunca,te, so that when the skulls are 

 reversed and resting on their upper surfaces the ends of the 

 nasals are not visible from above. 



Measurements. — Ear of type, 22 mm. For other measurements 

 see table, p. 75. 



Specimens examined.. — Six from the type-locality. 



Remarks. — Though differing very little bodily from the main- 

 land animal, this race is easily separated from it on cranial 

 characters, the short nasals and blunt muz^gle being very 

 distinct. 



35. Epimys rattus klumi;:^si9, subsp. n. 



Type. Adult female (skin and skuU), No. 1596/C.B,K. 

 B.M. No, 15,11.4.207, Collected on Koh Klum Id., S.E. Siam, 

 18th December, 1914. 



Diagnosis, — Size larger and pelage coarser than the previous 

 forms, with numerous long black piles on the rump. Colour 

 above grizzled-brown and buif, darkest on the riimp ; below 

 ivory-yellow, an indistinct greyish band along either side of the 

 abdomen, separating it from the colour of the upper parts. Feet 

 parti-coloured ; tail considerably longer than body, relatively 

 longer than any of the other local races, 



Skull generally resembling that of the mainland animal, but 

 more robust and with the nasals much narrower posteriorly and 

 longer, prolonged well behind a line joining the anterior edges 

 of the orbits. 



Measurements, — See table, p, 75. 

 Specimens examined. — Five from the typerlocality. 

 Remarks, — The larger size, relatively long tail, and long, 

 posterioi'ly narrower, nasals clearly distingviish this race from 

 either of the preceding ■ particularly the latter with its short 

 square muzzle. It belongs, with the following forms, to the 

 section of the rattus group consisting of large animals heavily 

 sprinkled on the rump with long piles, and having large robust 

 skulls, which includes the similar races of Ej^imys pannostis and 

 mara Miller, E, ^eniotus Robinson & Kloss, and is largely of 

 insular habitat, 



36. BpiMys RATTUS MAKENSis, subsp. n, 



Tyi^e. Adult male (skin and skull), No, 1616/C.B.K. B.M, 

 No. 15.11.4.211. Collected m Koh Mak Id., S.E, Si^m, 19th 

 December, 1914, 



