NO. 1481. .MAMMALS FROM KARUfATA ISLANDS—MILLER. 59 



Family MURID.?^]. 



MUS NEGLECTUS Jentink? 



Four skins from Pulo Serutu and three from Karimata represent a 

 species closel}^ resembling- the Bornean Afns neglectm Jentink. With- 

 out material for direct comparison it is impossible to identify the Kari- 

 mata form. For measurements, see table, page 60. 



MUS SERUTUS, new species. 



Tijpe.—kAvM male (skin and skull) No. 125032, United States 

 National Museum. 



Collected on Pulu Serutu, Karimata Islands, August 17, 1004, ])y 

 Dr. W. L. Abbott. Original numlier, 3590. 



Characters. — A large, dark form of the 3£us snrifer group resem- 

 bling M. lingensis., but color darker and skull with less broadened 

 rostrum; size greater and color not as dark as in 2fas pagensis. 



Color. — Ground color dull tawny, darkening slightly on hind legs, 

 and fading on front legs nearly to ochraceous-buff. On ])ack and sides 

 this is nearly concealed by the bristles, which are dark brown at 

 tip, ecru-drab through the greater part of their length. Nape, crown, 

 and face tawny washed with dark brown. Cheeks ochraceous buff. 

 Feet dull white, with no trace of the dark clouding present in 3£us 

 pagensis. Under parts pale cream-butf. Tail sharply bicolor, dark 

 brown above, whitish below, and at tip. 



Skull and teeth. — The skull differs from that of Mas lingensis in the 

 distinctly less broadened rostrum, in this respect resembling the skull 

 of Mas surifer. Otherwise neither it nor the teeth show au}^ special 

 peculiarities. 



Measurements. — For external measurements see table, page 60. 

 Skull of type: Upper length, 49 mm.; condylobasilar length, 41; 

 basilar length, 38; palatilar length, 19.8; diastema, 12.6; breadth of 

 rostrum midway between base of zygoma and tip of nasals, 7.2; « 

 interorl)ital constriction, 7.6; breadth of braincase above roots of 

 zygomata, 18; mandible, 26.6; maxillary tooth row (alveoli), 7.6; man- 

 dibular tooth row (alveoli), 7. 



Specimens examined. — Twelve, all from Pulo Serutu. 



RemarTis. — Although in a general way resembling the two other 

 dark members of the group, this species is readily distinguishable 

 from Mus lingensis by its slender rostrum and from Mas pagensis by 

 its less darkened color and its clear white feet. In two of the skins 

 there is a complete collar of dull ochraceous buff, and in three others 

 there is some indication of a similar band. 



MUS CARIMAT.(E, new species. 



Tijpe. —Adult male (skin and skull), No. 125079, United States National 

 Museum. Collected at Telok Pai, Karimata Island, August 20, 1904, by 

 Dr. W. L. Abbott. Original number, 3612. 



« In two skulls of Mas lingensh, female, No. 113040, with basilar length 37 mm., 

 and male, No. 113048, with basilar length 38 mm., their breadth is 8 mm. and 8.4 

 mm., respectively. 



