I92i.| S. L. HOKA : Notes on Fishes. 17 



general facies in the two is similar as is also the position of the 

 mouth and the structure of the labial fold. The points of differ- 

 ences are, however, numerous and important. In a well-preserved 

 specimen of P. tentaculatus a small pad can be made out just be- 

 hind the bilobed lower lip, while in the new species there is a 

 distinct callous disc and the lower lip is not bilobed. In P. dis- 

 cophorus the ventral surface is more rounded and is absolutely 

 devoid of scales, the head is shorter and narrower and the eyes 

 are distinctly visible from below. The two species also differ in 

 proportions and number of scales. The paired fins in P. disco- 

 phorus are not so expanded as in P. tentaculatus and are not pro- 

 vided with muscles on their ventral aspect. 



