154 PROCEEDINGS OF THE ACADEMY OF [Marcb, 



skiill is readily distinguLshed from that of N. exllk by its lai-ger 

 size. 



Measurements. — External measurements of type: Total leiigtli, 

 165; head and body, 88; tail vertebrae, 77; hind foot, 25 (28). 



Specimens Examined. — One, the type. 



RemarJcs. — In all probability this is the Sumatrau form of 

 JNannosciuriis melanotis described and figured by Temminck and 

 Schlegel.* It is not impossible, however, that the Sinkep animal 

 may prove to be distinct from that of the larger island. Nanno- 

 sciarus -pulcher is readily distinguishable from N. melanotis, as well 

 as from all other known members of the genus, by the conspicuous, 

 sharply defined, whitish nape patch. 

 RMnosoiurus laticaudatus (Miiller and Schlegel). 



A very old male was taken on Linga Island, August 28, 1901. 

 It was brought in by Malays, who had secured it in a jerot or snare. 

 As compared with a young female from Sirbassen Island, South 

 Natunas, this specimen is darker above and less yellowish below. 

 Mus lingensis Miller. 



Seventeen specimens (seven skulls without skins) from Linga 

 Island, and thirty-three (eight in alcohol and twelve skulls without 

 skins) from Sinkep Island. The two series agree Avell with each 

 other in bearing out the characters of the species — that is, in less 

 yellow coloration and narrower, more elongate palate, as compared 

 with Mus surifer. 

 Mus sp. 



The imperfect skull of a small brown rat taken on Linga Island, 

 August 30, 1901 (d^, No. 113,053), represents a species closely 

 related to 3Ihs asper. Its exact identification is impossibl'e. 

 Mas fremens sp. nov. 



Type.— Adnlt male (skin and skull). No. 113,087 United 

 States National Museum. Collected on Sinke}) Island, South 

 China Sea, September 4, 1901. Original number 1,273. 



Characters. — A member of the sabanus-vociferans group, but 

 color less tawny than in any of the forms hitherto known. 



Color. — Back and sides a fine grizzle of drab, ochraceous-buff, 

 and blackish horn color, the latter much in excess everywhere except 



^ Verhandel. over de Natuurlijke Gescbiedenis der Xederl. overzeesche 

 Bezittingen, p. 98, PI. XIV, fig. 5. 



