CYPRINID.T;. CYPRINIWJE. 273 



concave. Pectoral nearly as long as the head. Caudal deeply 

 forked. Scales 4| rows between lateral line and base of ventral 

 fin. Colour silvery, dorsal and caudal fins externally stained with 

 grey ; sometimes a dark blotch on the scales near the commence- 

 ment of the lateral line. 



Hob. Poona and the Deccan. 



10. Genus OSTEOCHILUS, Giinther. 

 Syn. Rohita, sp., Cuv. & Val. 



Abdomen rounded. Mouth of moderate width, directed more 

 or less downwards ; lips thickened, continuous, fringed or crenu- 

 lated, the lower being reflected from off the mandible, leaving it 

 uncovered in the form of a sharp and hard, transverse, prominence. 

 No tubercle at syrnphysis. Snout obtusely rounded. Barbels 

 four or two. Pharyngeal teeth usually 5, 4, 2/2, 4, 5. Dorsal fin 

 without osseous ray, with a moderate number of branched rays 

 (10 to about 20), commencing in advance of the ventrals. Anal 

 with few rays. Scales of moderate or small size ; no tile-like row 

 at base of anal fin. Lateral line passing to the centre of the base 

 of the caudal fin. Gill-rakers short. 



Geographical Distribution. Burma and the Malay Archipelago. 



Synopsis of Indian Species. 



D. 2/18, A. 3/5, L. 1. 64. Four barbels. 



Colours uniform 1. O. chalybcattis, p. 273. 



D. 2-3/15-16, A. 2/5, L. 1. 34. Four barbels. 



A darkish band near commencement of 



lateral line, and a dark mark before base 



of caudal fin 2. O. neilli, p. 274. 



D. 3/13, A. 3/6, L. 1. 40. Two barbels. 



Colours uniform 3. O. cephalns, p. 275. 



315. (1.) Osteochilus chalybeatus. 



Rohita chalybeata, Cuv. # Val. H. N. Poiss. xvi, p. 271. 

 Osteochilus chalybeatus, Day, Wsh. India, p. 545, pi. cxxix, fig. 1 



(see synon.). 

 Nya-leh, Burmese. 

 B.iii. D. 20(2/18). P. 18. V. 9. A. 7 (2/5). C.I!). 



L. 1. 54. L. tr. 8/10. 



Length of head 5, height of body 4| in total length. Eyes 

 diameter 4 in length of head, \\ diameters from end of snout, and 

 2 apart. Snout overhanging the jaws and without any lateral 

 lobe. Mouth rather narrow, its width being about one third of 

 length of head. Lips thick and fringed, with an inner fold above 

 and below. Barbels the maxillary pair half as long as the orbit, 

 the rostral shorter. Fins the dorsal commences midway between 



T 



