332 CYPEINID^. 



origin of the anal fin ; anal fin long, many-rayed ; caudal fin forked ; 

 pectorals elongate; vcntrals with at least seven rays. Pseudo- 

 branchiae present. Pliaryngcal teeth slender, hooked, without ser- 

 rature, in a triple or double series. 

 East Indies. 



The species of this genus may be divided into two sections : — 



a. Those species in which the sharp median edge in front of the pecto- 

 ral fins is supported by the dilated bones of the forearm (O.cy- 

 ff aster) : — 



». Most of them have the pharyngeal teeth in a triple series (0.vi/- 

 l/aster), Yiz. O. anomaluriis, O. megalolejns, 0..ki/2}02)M7iaImus, and 

 O. siamensis. 

 /3. Pharyngeal teeth in a double series (3I(icrocJiirichthi/s) : 0. ma- 

 crochir. 

 h. Those species in which the bones of the forearm are not dilated and 

 do not support the thoracic edge (Securicula, m.) : CJi. gora, Ch. ha- 

 caila, Ch. aryentea, Ch. laubuca, Ch. dupeoides. 



I should have at once arranged the species in this manner, but 

 several which evidently belong to this group are very iusuificiently 

 known, so that it would be impossible in the present state of our 

 knowledge to refer them to the proper place in the system. 



1. Chela gora. 



Cyprinus gora, Ham. Buck. Fish. Gang. p. 203. 



Opsarius pholicephalus, i)/' Cldl. Lid. Cypr. p. 415, tab. 47. fig. 2 (bad). 



D. 10. A. 15. L. lat. ca 160. Vert. 46. 



The height of the body is less than the length of the head, which 

 is two-ninths of the total (without caudal). Snout considerably 

 longer than the eye. Nuchal scales extending forwards to above 

 the nostrils. Suborbital ring broad, but leaving a considerable 

 space within the prasopercular edge uncovered. The maxillary ex- 

 tends slightly beyond the vertical from the front margin of the eye. 

 The first anal raj^ is below the fourth of the dorsal fin. Pectoral fin 

 very long, longer than the head, but not extending to the ventral. 



Bengal and Assam. 



rt. Adult. Soan Eiver. 



6. Adult : stuffed. Ganges. 



c. Half-grown. Assam. From the Collection of the East-India 



Company. 



d. Adult: dried. 



2. Chela bacaila. 



Cyprinus bacaila, Ham. Bitch. Fish. Gang. p. 265, pi. 8. fig. 76. 

 Opsarius bacaila, M'Clell. Ind. Ciipr. p. 414. 



leucerus, MCIM. I. c. p. 415, tab. 47. fig. 3. 



Leuciscus bacaila, Bleek. Verh. Bat. Gen. xxv. Beny. Sf Hind. p. 137. 



D. 9. A. 14-16. V. 9. L. lat. 90-110. L. transv. 19/9. 



The height of the body is nearly equal to the length of the head, 



