Lv». THYNNICHTHT3. 



157 



162. Barbus cosuatis. 



Cyprinus cosuatia, Ham. Buck. Fish. Gang. pp. 388, 392. 



Systomus malacopterus, M^Clell. Ind. Cypr. pp. 287, 386, tab. 44. 



•fig. 9. 

 ? Rolitee pangut, Sykes, Trans. Zool. Soc. ii. p. 36o. 

 Leuciscus cosuatis, Bleek. Verh. Bat. Gen. Ned. Ind. xxv. 1853, 

 p. 139. 



L. lat. 22. Dorsal £11 without osseous ray. The height of the 

 body is contained twice and three-fourths in the total length, with- 

 out caudal fin, which is forked. Top of the dorsal fin and a spot 

 across the mid J.e of the anterior a;nal rays black. 



Bengal . 



a. Eiver Hooghly. From Dr. Bleeker's Collection. 



1G3. Barbus pyrrhoptems. 



Systomus pyrropterus, M'Clell. Ind. Cypr. p. 383, pi. 44. fig. 1, 

 L. lat. 22, L. transv. 4|/4^. The osseous dorsal ray is of mode- 

 rate strength and serrated. There are three longitudinal series of 

 scales between the lateral line and the root of the ventral fin. The 

 height of the body is contained twice and one-third in the total 

 length (without caudal). A roundish black spot on the lateral line, 

 immediately behind the anal fin. 

 Upper Assam. 



a-e. Skins, in bad state : typical examples. From M'CleUand's 



Collection. 

 /. From the Collection of the East- India Company. 



20. THYNNICHTHYS*. 

 Thynnichthys, Bleeker, Prodr. Cypr. p. 306. 



Scales small. Dorsal fin without an osseous ray, with not more 

 than nine branched rays, commencing nearly opposite to the ventrals ; 

 anal fin short. Head large, strongly compressed ; eye without weU- 

 developed adipose membrane, in the middle of the depth of the head. 

 Snout with the integuments very thin ; there is no upper lip, and the 

 lower jaw has a thin labial fold on the sides only. Mouth anterior 

 and lateral ; barbels none. Lateral line running nearly along the 

 middle of the tail. Gill-rakers none ; laminae branchiales long, half 

 as long as the postorbital portion of the head; pseudobrauchiae 

 none. Pharyngeal teeth lamelliform, with flat oblong crown, 

 5 . 3 or 4 . 2 — 2 . 4 or 3 . 5, the teeth of the three series being wedged 

 into one another. 



East-Indian archipelago and Pegu. 



* Leuciscus harengula, C. &• V. xvii. p. 303, pi. 500. — Irawaddy. 



