26 Miller — Six New Mammals from the Mala]/ Archipelago. 



more than"half that of succeeding tooth; length of crowns of the two 

 lower premolars together decidedly less than that of first molar. 



Measurements. — Type: head and body, 40; tail, :!4; tibia, 14.8; foot, 

 7.2; forearm, 33.6; thumb, 6.2; third finger, 60; fifth finger, 45; ear 

 from meatus, 13.6. Skull of type: condylobasal length, LI. 6; zygomatic 

 breadth, 9.0; interorbital constriction, 3.8; breadth of braincase, 7.0; 

 depth of braincase, 5.0; mandible, 8.6; maxillary toothrow exclusive of 

 incisors, 4.2; mandibular toothrow exclusive of incisors, 4.4. 



Specimens examined. — Two, both from Engano. 



Epimys maerens sp. now 



Type. — Adult female (teeth so much worn that enamel pattern is 1 >egi li- 

 ning to be obscured ) No. 141,193, V. S. National Museum. Collected at 

 mouth of Mojeia River, Nias Island, Sumatra, March 11, 1905, by J>r. 

 W. L. Abbott. Original number, 40<>2. 



Diagnosis. — A member of the Epimys rattus group; color as in the dark 

 E. shnalurensis of Simalur Island, Sumatra, but size decidedly less, the 

 hind foot not attaining a length of 40 mm., the maximum condylobasal 

 length of skull among twelve adults, 42 mm. 



Measurements. — Type: head and body, L78; tail, 168; hind foot, :!4; 

 (32). Average and extremes of the six largest specimens: head and body, 

 17S (170-185) ; tail, 159(155-168); hind foot, 34.9 (33.6-36); hind toot. 

 without claws, 33.1 (32-34). Skull of type and of largest specimen in the 

 series: condylobasal length, 39.8 and 42.0; zygomatic breadth, 20.2 and 

 19.8; interorbital constriction, 6.8and 6.6; breadth of braincase, 10.0 and 

 1(').0; depth of braincase at middle, 11.8 and 12.0; nasal, 14.2 and 15.2; 

 depth of rostrum behind incisors, 8.2 and 8.0; mandible, 25.0 and 26.0; 

 maxillary toothrow, 6.6 and 7.0; mandibular toothrow, 6.2 and 7.0. 



Specimens examined. — Nineteen, all from Nias Island. 



Remarks. — The Nias representative of the Epimys rattus group shares 

 the dark color of the other Barussan local forms. The upper parts have 

 more of the burly cast than is usual in E. simalurensis and the belly is a 

 clearer smoky gray, but the difference is very slight. In size there is a 

 marked contrast witli E. simalurensis and E. lugens, in both of which 

 the length of the hind foot usually exceeds 40 nun., and the condylobasal 

 length is usually more than 45 mm. In both size and color the scries is 

 remarkably uniform. Two Nias specimens, however, represent a light col- 

 ored species essentially like Epimys neglectus (Nos. 121,8(12 and 141,184); 

 this animal has probably been artificially introduced. 



Epimys barussanus sp. now 



Type. — Adult male (teeth moderately worn), skin andskull No. 141,208, 

 U. S. National Museum. Collected at mouth of Mojeia River, Nias Island, 

 Sumatra, March 10, 1005, by Dr. W. L. Abbott. Original number, 4010. 



Diagnosis. — A member of the Epimys cremoriventer group resembling 

 the previously known species in general appearance, but size decidedly 

 greater, and skull with anterior portion of rostrum widened. 



