GYMNURA CANDroA. 1Ö7 



collected by the late S. Muller, the other from Malacca 

 and an albino-specimen from Borneo , many years ago sent 

 over by the late Dr. Schwaner; and further two complete 

 skeletons , one of the Sumatra-specimen , the other of the 

 Borneo-individual. In comparing these skeletons I soon 

 saw that they presented many differences and now , ha- 

 ving closely studied and compared them , I do not hesitate 

 to say that we have here to do with two distinct spe- 

 cies. I will shortly explain the differences, which I have 

 observed. In the skull of the Borneo-specimen the mo- 

 lars and canines have not yet attained their full growth, 

 while in the other all the teeth are well developed, and 

 although the former must for this reason be regarded as a 

 younger individual , it is nevertheless larger and its skeleton 

 is much stouter in all its forms and dimensions. In both 

 of them the number of vertebra and costae is the same , 

 viz: 15 dorsales with 15 ribs, 5 lumbares, 5 sacrales and 

 26 caudales. The skull of the Borneo-specimen is of a more 

 elongate form , and less broad than in the Sumatra-specimen. 



Sumatra-sp. Borneo-sp. 

 m.m. m.m. 



Length of skull 75 79.5 



Width between jugalia 38 36.5 



Distance between the foremost corner 



of the eyehole and the first incisor 33.5 37 



In the Sumatra-specimen the palate is more excavated , 

 but shorter than in the other one, measuring in the. latter 

 49 m.m. and in the former 46 m.m. As I have already men- 

 tioned the teeth in the Borneo-skull are not wholly de- 

 veloped , and indeed instead of each foremost upper in- 

 cisor there are two teeth, of which the hindest is the smaller , 

 and instead of the large canines I see in each upper 

 jaw two smaller teeth, and in each lower a single tooth 

 which is but a little larger than the incisors. The second 

 molars in both jaws also are not yet fullgrown. But the 

 teeth in general and especially the molars are much 

 stouter, larger and broader than in the Sumatra-skull. 

 Notes i'roxn tlie Leyden JMueieum, "Vol. III. 



