454 PR0CEEDTNG8 OF THE NATIONAL MUSEUM. vol. xxxvi. 



S/,'yU and teeth. — These possess the same relative shapes and pro- 

 portion as they do in Gymnura gymnura.^ but are distinctly larger 

 throughout. See fig. 3, Plate 35. 



Measurements. — See table, page 455, and diagram, page 452. 



Distribution. — Borneo and the off-lying island of Labuan. Speci- 

 mens in the U. S. National Museum are from along the Sempang 

 River, southwestern Borneo. 



Remarks. — I have been unable to find any constant character, aside 

 from size and color, to distinguish between Gymm,iira gymnura and 

 G. alba. 



As in point of size the two species of Gymmira overlap one another 

 slightly, it would be impossible to identify positively a large albino 

 specimen of G. gymnura or a small individual of G. oUki. A black 

 individual is mentioned by Dobson « as possibly coming from Borneo. 

 The size relationships of the three forms on the basis of hind foot 

 and basal length of skull are shown by the diagram, page 452. 



« Monogr. Insectivora, p. 4. 



