342 Records oj the Indian AUiseum [Vol. Ill, 1909.] 



contained almost twice in the interval between the bases of the 

 anal and caudal fins. Free end of dorsal fin is a straight line and 

 the caudal is rounded. 



Shape elongated and round ; thicker in front and tapering from 

 behind the dorsal fin. Dorsal profile curves up from the posterior 

 root of the dorsal fin, reaching the highest point midway between 

 the anterior root of the dorsal and the nape of the neck. Head 

 not sloping but rather flat. The ventral profile is slightly curved 

 downwards, the lowest point being the anterior root of the ven- 

 tral fin. 



Lateral line complete and slightly curved from below the 

 anterior root of the adipose fin-like structure to the upper corner 

 of the gill-cleft, and follows the curvature of the dorsal profile 

 closely. 



Scales very small and highly deciduous, found all over the 

 body. 



Colour. — Brown all over, head and dorsal part slightly darker 

 than ventral surface. Barbels lighter brown. Dorsal and caudal 

 fins banded with darker bands, pectoral also slightly banded, but 

 anal and caudal of a uniform light brown colour. 



The type, which is 28 cm. in length, is in the collection of 

 the Indian Museum (No. F -'-V-) and was collected in the affluents 

 of the Helmand by Colonel Sir A. H. McMahon, K.C.I.E., C.S.I. , 

 and the officers of the Seistan Arbitration Commission. The 

 species differs in many important characters from Tate Regan's 

 N. rhadincBus from the same locality. One of the types of the 

 latter species is also in the collection. 



