NO. 21 FIFTY-ONE NEW MALAYAN MAMMALS- -MILLER 13 



Measurements. — Type: head and body, 189 nun.; tail, 233; hind 

 foot, 40 (dry, 39, 37.5) ; condylobasal length of skull (teeth slightly 

 worn), 40.7; zygomatic breadth, 19.6; interorbital constriction, 6.8; 

 mastoid breadth, 16.4; depth of braincase, 11.2; nasal, 15.8; diastema, 

 11.4; mandible, 25.3; maxillary toothrow (alveoli 1, 6.8; mandibular 

 toothrow (alveoli), 6.4. 



Specimens examined. — Thirteen, from the following localities in 

 Dutch Southeast Borneo: Lo Bon Bon, 3; Samarinda, 4; Tangga- 

 rung, 2; Tanjong Batu, 1 ; Talisaian Mountain, 1. 



Remarks. — The thirteen specimens on which this form i-> based dif- 

 fer conspicuously from the south Bornean races in the dull color of 

 their underparts. In this feature they resemble Epimys tita, but they 

 show no tendency toward darkening of the back. 



EPIMYS RATTUS PAUPER, new subspecies 



1901. Mus ncglectus Miller, Proc. Washington Acad. Sci., vol. 3, p. 121. 

 March 26, 1901. (Part. Not of Jentink.) 



Type. — Adult male (skin and skull), No. 104828, United States 

 National Museum. Collected on Sirhassen Island, South Natuna 

 Islands, June 4, 1900, by Dr. W. L. Abbott. Original No. 433. 



Diagnosis. — Like Epimys rattus neglect us from southern Borneo 

 but smaller. 



Measurements. — Type: head and body, 170 mm.; tail, 155: hind 

 foot (dry), 33.5 (32) ; condylobasal length of skull (teeth much 

 worn), 36.9; zygomatic breadth, 17.2; interorbital constriction, 6.2; 

 occipital breadth, 14.4 ; depth of braincase, 10.2 ; nasal, 14.0 ; diastema, 

 10.8; mandible, 23.0; maxillary toothrow (alveoli), 6.4; mandibular 

 toothrow (alveoli), 6.1. 



Specimens examined. — Five, all from Sirhassen Island. 



EPIMYS RATTUS VICLANA, new subspecies 



Type. — Adult male (skin and skull), No. 123861, United States 

 National Museum. Collected on Pulo Laukawi, off west coast of 

 Malay Peninsula, November 3, 1903, by Dr. W. L. Abbott. Original 

 No. 2800. 



Diagnosis. — Like the form of Epimys rat f us occurring in Trong 

 and southern Tenasserim but color of back and sides duller ami 

 more finely blended (grizzled rather than "lined'*!: cheek teeth 

 slightly though evidently larger than in the mainland race. 



Measurements. — Type: head and body, 180 mm.: tail, [67; hind 

 foot (dry), 34.5 (33.5); condylobasal length of skull (teeth much 



