THE FISHES OF MALABAR. 217 



length: jaws completely covered by (lie lips: posterior labial sulcus simple on either side. Centre of 

 upper jaw emarginate to receive a knob which exists at the symphysis of the lower jaw. Opercles smooth. 

 Scales small and deciduous. Lateral line curves downwards and ceases abruptly opposite ventral fin. 

 Dorsal fin short, its base without scales, it arises behind the commencement of the vcntrals, bat docs not 

 extend so iar as to above the anal. Anal short, without bony rays, commencing behind the end of dorsal. 

 Branchial aperture cleft to below the eyes. Pharyngeal teeth in three rows, large, molar like, with their 

 free surfaces concave or spoon-shaped, 1, 2, 8 J 3, 2, 1. 



Amblypiiai:yx<;oI)ux Jekdoxi. Plate XVII. Fiff. 1. 



Bbachygbamma Jeedoni, 1%, Proc. Zool. Soc. 18G5, p. 304. 

 Wumboo. Mai. 



B. iii. D.f. P. 15. V. 9. A. f. C. 19. L. 1. 63. L. tr. \P. 



Length of head \, of pectoral \, of base of dorsal ^, of base of anal fa, of caudal \ of total 

 length. Height of head \, of body \, of dorsal f, of anal \ of total length. 



Eyes — The lower margins of the orbits are as close to the inferior, as their upper margins are to 

 the superior profile of the head. Diameter \ of length of head, a little more than ^ a diameter 

 from end of snout, 1| diameters apart. 



Profile rises gradually from the snout to the posterior end of the head, from whence there is 

 a gradual decline to the caudal. The abdominal profile is rather more convex than that of the 

 dorsal. Sides compressed, abdomen rather flat. Head compressed from side to side. Snout 

 broad and depressed. 



Mouth moderate in size and oblique, lower jaw the longest, armed with a hook at its sym- 

 physis, which is received into a corresponding emargination in the upper jaw. When the mouth 

 is closed the upper surface of the lower jaw forms a portion of the superior profile of the head. 

 Lips thin, covering both jaws. Muzzle apparently rather pointed when the jaws are closed. 

 Intermaxillaries slightly protrusible. Preorbital triangular, apex below. Nostrils close to the 

 anterior superior angle of the orbit, posterior broad and patent, divided by a valve from the 

 anterior, the margins of which are raised. Opercle smooth and nearly triangular. Gill openings 

 wide, and extending as far forwards as opposite the posterior margin of the orbits. 



Fins — Dorsal arises rather nearer to the caudal than to the snout, is slightly behind the origin 

 of the ventral, but does not extend as far backwards as to above the commencement of the anal, 

 both are square : anal situated in the posterior third of the body, and arising midway between the 

 orbit and the end of the inferior lobe of the caudal. Caudal deeply lobed. 



Teeth — Pharyngeal short, wide and transversely oval : summits concave, both from side to 

 side, and from before backwards, in fact similar to the concave sui'face of a spoon, 3, 2, 1 | 1, 2, 3. 



Scales — Extremely deciduous, very small on the chest and as far as the ventral fins. 



Lateral hue — Formed of long single tubes in each scale. It only extends along fifteen rows, 

 curving downwards, and then ceases. 



Colours — Greenish above, silvery below. A bright silvery greenish yellow line separates the 

 green of the back from the silvery sides and abdomen. Summit of head bright green. Inside of 

 mouth and lips closely spotted with black. Fins colourless. Eyes white. 



Is not uncommon in the rivers and ponds. I have named the species after Dr. Jerdon, who 

 records two of this genus which he discovered in Southern India. 

 Habitat — Malabar. 



2 p 



