IO SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 6l 



42.7 (43.2) j 1 zygomatic breadth, 19.6 (21.5) ; interorbital constriction, 

 7.2 (7.4) ; occipital breadth, 15.8 (17.6); depth of braincase, 10.1 

 (11.3); nasal, 17.0 (17.4); diastema, 13.3 (13.0); mandible, 26.0 

 (27.4) ; maxillary toothrow (alveoli), 6.7 (7.4) ; mandibular tooth- 

 row (alveoli), 6.5 (7.2). 



Specimens examined. — Three, all from St. Barbe Island. 



EPIMYS ROA, new species 



Type. — Adult female (skin and skull), No. 1 12444, United States 

 National Museum. Collected on Pulo Aor, off east coast of Johore, 

 June 8, 1901, by Dr. W. L. Abbott. Original No. 1025. 



Diagnosis. — A member of the rattus-group resembling Epimys 

 pannosus, but color paler and with a decided tinge of drab; skull with 

 rostral portion more robust than in the Butang animal. 



Measurements. — Head and body, 203 mm.; tail, 187; hind foot 

 (dry), 37.5 (36) ; condylobasal length of skull (teeth much worn), 



42.8 ; zygomatic breadth, 21.2 ; interorbital constriction, 6.8 ; occipital 

 breadth, 7.2; depth of braincase, 11.1; nasal, 16.5; diastema, 12.8; 

 mandible, 26.0; maxillary toothrow (alveoli), 7.1 ; mandibular tooth- 

 row (alveoli), 6.6. 



Specimens examined.- — The type and an immature individual, both 

 from Pulo Aor. 



Remarks. — Though nearly related to the form occurring on Pulo 

 Tinggi this animal is easily distinguishable by the lighter, drab-tinged 

 color of the upperparts. In the dry state the ears appear to be smaller 

 than the Tinggi form. 



EPIMYS MARA, new species 



Type. — Adult female (skin and skull), No. 196751, United States 

 National Museum. Collected on Maratua Island, Dutch Southeast 

 Borneo, August 28, 191 2, by H. C. Raven. Original No. 187. Pre- 

 sented by Dr. W. L. Abbott. 



Diagnosis. — A large member of the rattus-group resembling Epi- 

 mys pannosus of the Butang Islands, but color darker, skull larger, 

 and teeth smaller ; nasals distinctly spatulate anteriorly. 



Color. — Upperparts seal-brown mixed with isabella-color, the mix- 

 ture inconspicuous along median region but gradually increasing lat- 

 erally until the lighter element predominates on sides of body and 

 outer surface of legs. Underparts and inner surface of legs vina- 



1 Cranial measurements in parenthesis are those of a female Epimys tingius 

 of about the same age (No. 112728). 



