654 PROClJEDINGS OF THE NATIONAL MUSEUM. vol. xxxi. 



essentially from skins of Scimyis peninsulm'is Miller/' of the Mala}' 

 Peninsula. Mr. Bonhote '' has recenth' shown that the latter is iden- 

 tical with Sciurus mttatus Raffles.'^ 



MUS CONCOLOR Blyth. 



19()(>. Mus concolur, Miller, Proc. U. S. Nat. Mus., XXXI, 1906, p. 267. 

 Four skins and skulls, collected at Senimba Bay, two in September, 

 1905, and two in March, 1906. It is possible that these specimens may 

 not be typical J/iis concolor. The only examples of true If. concolor 

 in the Museum are too immature for use in making suitable compari- 

 sons. Mr. Kloss's specimens are quite close to Muh surduM Miller, -' of 

 Simalur Island, from which they differ mainly in smaller size of skull, 

 shorter rostrum, and greater interorbital width. 



MUS BATAMANUS, new species. 



Type.— AdiuM male, skin and skull, Cat. No. 143232, U.S.N.M., 

 collected at Senimba Bay, Batam Island, off southern end of Malay 

 Peninsula, March 30, 1906, by Mr. C. Boden Kloss. Original 

 number 75. 



Diagnostic characters. — Similar to Mus jerdoni Blyth, but tail 

 shorter than head and bod}-, and, as compared with a Tenasseiim 

 example of M. jerdoni.^ duller colored, and with slightly heavier 

 interorbital region. 



Colo)'. — Upper parts generally" an ill-defined grizzle of dull ochra- 

 ceous buff^ and blackish, much lighter and duller on the sides, and 

 with much less admixture of black; underparts generall}- similar to 

 Ridgway's No. 9 gray. Ears blackish brown; feet whitish. Tail, 

 bicolor, dark brownish above, whitish beneath. The soft or typical 

 hairs above have dull ochraceous tips and No. 6 gray bases; on the 

 lower parts their tips are whitish and bases No. 8 gray. The pelage is 

 everywhere beset with grooved and flattened spines, longest and most 

 numerous above, where their bases are slate gray in color and the tips 

 slate black. On the underparts the spines are less numerous, smaller 

 and whitish throughout. On the sides the bases of the spines grow 

 lighter in color, becoming whitish as the bell}' is reached. Many of 

 the spines on the upper sides of the body are tipped with dull ochra- 

 ceous buff, and as the belly is approached all the spines are so tipped. 



Sl-idl. — The skull of Mus hatamanus does not differ conspicuoush' 

 from skulls of 2£us jerdord; the palatine foramina are shorter and 



"Smithsonian Miscell. Coll., XLV, p. 10, November 6, 1903. 



6 Proc. Zool. Soc. London, 1906, I, pp. 5, 6, published June 7, 1906. 



<^' For a consideration of the Sumatran forms of this species and the status of Sciurus 

 peninsularis, see Lyon, Smithsonian Miscell. Coll., XLVIII, 1906, p. 278. 



«Proc. U. S. Nat. Mus., XXVI, p. 460, February 3, 1903. 



« Color terms in this jjaper are taken from Ridgway's Nomenclature of Colors for 

 Naturalists. 



