no. 1809. MAMMALS FROM BORNEO AND VICINITY— LYON. 103 



timeter, each scale subtended by three hairs, equalling a scale or a 

 scale and a quarter in length. 



Slcull and teeth. — These show no special characters, and I can 

 find no essential differences to distinguish them from the skulls 

 and teeth of Epimys Jirmus. 



Measurements. — For measurements of the type and series see 

 table, page 104. 



Specimens examined. — Eleven, all from Pulo Sebuku. 



Remarks. — Epimys sebucus at best can only be considered a slightly 

 differentiated form of the widely distributed Epimys Jirmus group, 

 of which there are many examples in the museum from Sumatra 

 and adjacent islands and the Rhio-Linga Archipelago. No members 

 of the group were taken on Borneo. 



EPIMYS CRASSUS, new species. 



y ;/i)e ._Skin and skull of adult male, Cat, No. 145471, collected on 

 Pulo Lamukotan, off the west coast of Borneo, May 8, 1907, by 

 Dr. W. L. Abbott. Original number, 5190. 



Diagnostic characters .—A large member of the Epimys jirmus l 

 group, differing from the typical form in larger size, larger and 

 heavier skull, and a rather prominent swelling on the anterior 

 portion of the nasal bones. 



Color. Type: Upper parts and sides of head, neck, and body, 



and outer sides of legs a coarse grizzly mixture of blackish and buff, 

 slightly darker and rather duller than that of Ridgway; under parts 

 and inner sides of legs cream color, the hairs essentially the same 

 color throughout; tail and feet light brownish; ears dark brownish, 

 very scantily covered with short, dark hairs. 



Pelage.— Pelage of three kinds of hairs; short, uniformly grayish 

 colored under fur; longer hairs with dark bases, a buffy middle 

 portion, and blackish tips; and long, slender grooved bristles, black- 

 ish in color; the three types named in the order of their abundance. 

 Middle portion of tail with eight and one-half scales to the centi- 

 meter, each scale subtended by three hairs, equally about a scale 

 and a quarter in length. 



Slcull and teeth.— The skulls of Epimys crassus average larger and 

 heavier than do those of E. Jirmus of like age, and most of the speci- 

 mens have an elongated swelling on the outer side of the anterior 

 half of the nasal bones, which is barely indicated on the skulls of 

 other members of the Jirmus group. The teeth average slightly 

 smaller 'than they do in Epimys sebucus. The bulla?, also, are a 

 trifle smaller in E. crassus. 



Measurements— F 'or measurements of the type and series see 



table, page 104. 



Specimens examined .—Fourteen, from Pulo La mukotan. 



i Miller, Proc. Acad. Nat. Sci. Phila., 1902, p. 155, June 11, 1902. 



