NO. 21 FIFTY-ONE NEW MALAYAN MAMMALS — Mil I IK 19 



orbital constriction, 7.6; nasal, 18.8; diastema, 13.0; mandible, 38.2; 

 maxillary tootbrow (alveoli), 9.0; mandibular toothrow (alveoli), 

 9.0. 



Specimen examined. — The type. 



EPIMYS STENTOR, new species 



Type. — Adult female (skin and skull), No. 124044, United States 

 National Museum. Collected on James Island, Mergui Archipelago, 

 January 2, 1904, by Dr. W. L. Abbott. Original No. 2983. 



Diagnosis. — A member of the Epimys vociferans group with skull 

 more robust and rostrum deeper in proportion to its length than in 

 any of the previously known forms. Color as in E. vociferans. 



Measurements. — Head and body, 262 mm. ; tail, 323 ; hind foot 

 (dry), 46.3 (43.5) ; condylobasal length of skull (teeth moderately 

 worn), 53 j5 (53.8) f greatest length, 56.8 (56.9) ; zygomatic breadth, 

 27.1 (24.4) ; occipital breadth, 19.8 (18.8) ; interorbital constriction, 

 9-3 (8.7) ; nasal, 22.7 (21.2) ; diastema, 15.8 (14.8) ; length of ros- 

 trum from posterior rim of antorbital foramen, 19.0 (19.6) ; 1 

 depth of rostrum, 11.3 (10.4) ; depth at front of anterior molar, 14.7 

 (13.7); mandible, 35.2 (31.6); maxillary toothrow (alveoli), 9.7 

 (9.6) ; mandibular toothrow (alveoli), 9.7 (9.7). 



Specimen examined. — The type. 



Remarks. — The skull of Epimys stentor differs conspicuously from 

 that of the other members of the vo cifera ;u-group as represented by 

 the large series in the U. S. National Museum. 



EPIMYS VOCIFERANS INSULARUM, new subspecies 



Type. — Adult female (skin and skull), No. 104167, United States 

 National Museum. Collected on Domel Island, Mergui Archipelago, 

 February 2j, 1900, by Dr. W. L. Abbott. Original No. 329. 



Diagnosis. — Like Epimys vociferous lancavensis of Pulo Lan- 

 cawi but smaller, the greatest length of skull in fully adult individuals 

 rarely exceeding 54 mm. 



Measurements. — Type : head and body, 248 mm. ; tail, 330 ; hind 

 foot (dry), 45 (43) ; condylobasal length of skull (teeth moderately 

 worn), 50.1; greatest length, 53.7; zygomatic breadth. 24.6; inter- 

 orbital constriction, 8.3; nasal, 20.0; diastema, 14.4; mandible, 31.6; 

 maxillary toothrow (alveoli), 10.0; mandibular toothrow (alveoli), 

 9.7. 



Cranial measurements in parenthesis are those of a male /.. vociferans 

 (No. 112651) from Johore. Teeth moderately worn. 



