64 CYPRINID.?:. 



^. Tylognathus boga. 



Cyprinus boga, Ilmn. Buck Fish. Ga»f/. pp. 286, 386, pi. 28. fig. 80. 

 Gobio boga, M'Clell. Ind. Ci/pr. pp. 278, 361; Bleek. Verh. Bat. 

 Gen. xxvi. Hind. ^ Beng. p. 134. 



D. 12. A. 7. L. lat. 42. L. transv. 7|-6|/7. 



Moutli crescent-shaped, transverse, not very broad. Upper and 

 lower jaws with well-developed lips, which are continuous; each 

 jaw with a sharp inner fold. Two small barbels hidden in a deep 

 lateral groove. Snout rather thick, projecting beyond the lower 

 jaw, until a smaU lohe on each side. Eye of moderate size, some- 

 what behind the middle of the length of the head. There are five 

 longitudinal series of scales between the lateral line and the root of 

 the ventral fin. Body oblong, its depth being more than the length 

 of the head. The origin of the dorsal fin is considerably in advance 

 of that of the ventral, and nearer to the end of the snout than to the 

 root of the caudal. Caudal fin deeply forked. Coloration uniform. 



Bengal. 



a. Young. River Hooghly. From Dr. Bleeker's Collection. 



b. Fine specimen. Cossye River. Presented by Lieut. R. C. 

 Beavan, Esq. 



4. Tylognathus elegans. 

 D. 11. A. 7. L. lat. 36. L. transv. *i. 



Mouth transverse, with the lips weU developed ; lower jaw sharp. 

 Four small barbels. Snout (without tubercles) projecting beyond 

 the lower jaw. Eye two-sevenths or one-fourth of, and situated 

 before the middle of, the length of the head. There are three lon- 

 gitudinal series of scales between the lateral line and ventral fin. 

 The height of the bod}^ equals the length of the head, and is con- 

 tained four times and two-thirds in the total (without caudal). 

 Origin of the dorsal fin considerably in advance of that of the ven- 

 tral, and nearly midway between the extremity of the snout and 

 the end of the anal. Pectoral fin shorter than the head, terminating 

 at a great distance from the ventral. Caudal fin forked. Colora- 

 tion uniform, an indistinct silvery lateral band. 



Mesopotamia ? 



a. Numerous examples, two inches long. Euphrates expedition. 



5. Tylognathus nanus. 



Tylognathus nanus, Heckel, in Russeffger's Reisen, i. p. 1073 (without 

 figure). 



D. 11. A. 7. L. lat. 31. L. transv. 6/4-f-.r. 

 Mouth transverse ; upper and lower jaws sharp, with well- 

 developed lips. Fom- small barbels. Snout thick (tubercular), pro- 

 jecting beyond the lower jaw. Eye situated in the anterior half of 

 the head. There are four longitudinal series of scales between the 

 lateral line and the root of the ventral fin. Body subcylindrical, 

 its depth being equal to the Length of the head, which is one-fifth 



