452 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXXVI. 



Skull and teeth. — These are relatively large and heavy, otherwise 

 they do not differ from those of the race described below. See 

 fig. 2, Plate 35. 



Distribution. — The U. S. National Museum contains specimens 

 from Rumpin River, Pahang, Malay Peninsula ; Singapore ; Tapanuli 

 Bay, west coast of Sumatra ; the Siak region of eastern Sumatra, and 

 Piilo Tebing Tinggi, a low alluvial island off the east coast of 

 Sumatra. This form is probably generally distributed throughout 

 Sumatra and the lower extremity of the Malay Peninsula. 



67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 



BASAL LENGTH OF SKULL !N MILLIMETERS 

 • GYMNURAGYMNURAGYMNURA, -^ GYMNURA GYMNURA MINOR, O GYMNURA ALBA. 



Diagram to show the rklative sizes op thk three forms in the oenus (iYM.\URA as 



DETERMI.NED BY LENGTH OV HIND FOt)T, INCLUDING CL^WS, AND OF HASAL LENGTH OF 



SKULL. Measurements are in millimeters. Each dot represents an actual 



Remarks. — ^Vliat is apparently an albino specimen of this race is 

 recorded by Schneider « as Gymnura alba. He remarks, however, 

 that it is distinctly smaller than white examples that he has seen 

 from Borneo. Aside from color, difference hi size is apparently the 

 only manner by wdiich Bornean and Sumatran examples may be dis- 

 tinguished. Schneider himself thought his example only a " sport." 



«Zool. Jabrl). Syst., XXIII, V.)m, p. 89. 



