20 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 6l 



Specimens examined. — Thirty, from the following islands of the 

 Mergui Archipelago : Kisseraing, 6 ( I odd skull) ; Domel, 12(2 odd 

 skulls) ; Heifer, 2; Sullivan, 8; Hastings, 2. 



EPIMYS VOCIFERANS CLARM, new subspecies 



Type. — Adult male (skin and skull), No. 1 241 15, United States 

 National Museum. Collected on Clara Island, Mergui Archipelago, 

 January 10, 1904, by Dr. W. L. Abbott. Original No. 3019. 



Diagnosis. — Size as in Bpimys vociferous Incas of St. Luke, 

 Hastings and Loughboro Islands (intermediate between that of E. 

 vociferous insularum and the very small E. vociferous stridulus of 

 Bentinck Island) ; color duller and less yellowish than in the other 

 Mergui races, but not darkened as in E. vociferans matthceus. 



Measurements. — Type: head and body, 235 mm.; tail, 316; hind 

 foot (dry), 44 (42) ; condylobasal length of skull (teeth moderately 

 worn), 48.1; greatest length, 52.1; zygomatic breadth, 24.1; inter- 

 orbital constriction, 8.3; nasal, 20.1 ; diastema, 13.8; mandible, 30.6; 

 maxillary toothrow (alveoli), 9.6; mandibular toothrow (alveoli), 

 8.6. 



Specimens examined. — Five, all from Clara Island. 



Remarks. — With the exception of ELpimys stentor, which appears 

 to be specifically distinct from the other members of the group, the 

 forms of E. vociferans occurring in the Mergui Archipelago now 

 seem to be best treated as subspecies. The characters on which they 

 are based, though evident when series are compared, do not serve 

 for the positive determination of individual specimens. In a general 

 way the larger, less differentiated forms may be said to inhabit the 

 islands lying nearest the coast, while the smaller races are furthest 

 separated geographically from true Epimys vociferans of the main- 

 land. The most noticeable exception to this rule is furnished by 

 the small E. vociferans lucas, which occurs on one of the inner 

 islands barely separated from that on which the large dark E. vocif- 

 erans matthceus is found. Specimens scarcely distinguishable from 

 E. vociferans insidarum were obtained by Dr. Abbott on Pulo Ter- 

 utau, 350 km. south of the Mergui Archipelago. 



EPIMYS LEPIDUS, new species 

 1907. Mu s jerdoni Lyon, Proc. U. S. Nat. Mus., vol. 31, p. 654. January 

 16, 1907. (Specimen from Tenasserim. Not of Blyth.) 



Type. — Adult female (skin and skull), No. 104127, United States 

 National Museum. Collected at Bok Pyin, southern Tenasserim, 

 February 19, 1900, by Dr. W. L. Abbott. Original No. 315. 



