igiQ-J N. Annandale . Bombay Streams Fauna. 133 



McClelland 's figure is a somewhat exaggerated presentiment 

 of an adult male of this form , which must be accepted as specifi- 

 cally distinct in that it exhibits quite definite and constant struc- 

 tural modifications. It differs from D. lamta in the following 

 characters : — 



{a) The head is flattened and depressed in such a way that 



the upper border of the eye is practically co-termi- 



nous with the upper profile. The whole of the upper 



profile is straight and horizontal. 



(6) The abdomen is flat, and the chest is both flattened and 



expanded, 

 (c) The adhesive organ on the lower lip is much larger. 

 {d) The pectoral fins are enlarged and expanded, being 

 always longer than the head and separated when 

 adpressed from the ventrals by a distance less than 

 half their own length. They are set on the body 

 horizontally at the junction of the ventral and 

 lateral surfaces and form with the chest an organ 

 of adhesion. 

 [e) Several of the outer pectoral rays are simple and flat- 

 tened. 

 (/) The whole of the dorsal and lateral surfaces is nearly 



black, the ventral surface dead white, 

 (g) The length rarely if ever exceeds no mm. 



This species is found only in small hill streamlets. It occurs 

 in the Himalayas, the hills of Assam, the Western Ghats, the 

 hills of the Central Provinces and probably those of Burma. 

 Vinciguerra's figure cited above seems to represent this species 

 rather than D. lamta, but probably he had examined specimens of 

 both. 



Discognathus gravelyi, sp. nov. 



(Plate II, figs. 3, 3a). 



Having now been able to compare good series of well-pre- 

 served specimens of D. lamta from districts so far apart as the 

 Shan States and the Deccan, and having found certain differential 

 characters quite constant, I no longer hesitate to describe the new 

 species referred to in my recent account of the fish of the Inle 

 Lake {Rec. Ind. Mus. XIV, p. 45 : 1918). It is distinguished from 

 D. lamta by the different shape and the larger size of its mental 

 disk, by the different shape of the head, by its larger scales and 

 apparently also by difference in the formulae of the fin-rays. 

 D. 10(2/8). P. 14. V. 8. A 7(2/5). L. tr. 3^^/^. 



The total length is 5f times the greatest depth of the body 

 and a little more than 5 times the length of the head. The 

 length of the eye, which is large and prominent, is contained a 

 little more than 4-| times in that of the head. The snout is some- 

 what produced and in the adult male there is a deep but narrow 



