] Gl Report on some Fishes received from the Bitang Iiiver. [No. 2, 



Peeecbs bacaiea, (B. H.) Tenasserim. 



Mola, nobis, n. g. A well marked group, which Dr. Jerdon 

 referred to Khobebs of Agassiz, founded on the Gyprinus amarus, 

 auct. It is a form of Leuciscus, having very small scales ; the 

 mouth terminal and opening upward, with the lower jaw longer; no 

 cirri ; the eyes large, placed laterally near the muzzle. Form com- 

 pressed, rather deep, the back considerably arched, with the dorsal 

 medial or nearly so, and no osseous ray ; dorsal and anal fins with 

 few rays. The lateral line commences high, proceeding downward 

 and then backward, and terminating abruptly about the middle of 

 the body. No spots or other markings, beyond a broad silvery streak 

 along the sides. 



Type M. Bbchanani, nobis ; Gyprinus mola, B. H. 



M. Atkinsonii, nobis, n. s. Very similar to M. Bbcha:na:n t i, but 

 attains a larger size, and the scales are conspicuously larger in pro- 

 portion, the lateral silvery streak being also much broader and less 

 defined ; no tinge of blackish on the fins. Scales about 56 by 20 

 (but difficult to count). 



D. 8.— A. 7.— P. 15.— V. 9.— 0. 19. 



Length 4-§ in. by If in. deep. Tenasserim. 



JV. B. — The (lihodeus) inbicbs and (Eh.) macrocephaebs, Jer- 

 don (Madr. Joum. Lit. Sc. XV, 321), appertain to this particular 

 type; and the Leuciscus microlepis, Blkr. is probably identical with 

 M. hacbocephabbs, (Jerdon). The (Leuciscus) habengbea and 

 (L.) meteeeina of Valenciennes should also range in the same divi- 

 sion, even if the lateral line be continuous, as represented in the 

 figures of those species. 



Fam. Gobitidcc. The Loches. As suggested to me by Dr. Jerdon, the 

 species of the old genus Cobitis constitute an extensive natural family, 

 equivalent to Cyprinidae, Salmonidce, Siluridce, &c, and need to be 

 distributed into various genera.* In the LZistoire des JPoissons, 



* Mr. Swainson recognises Cobitidce as a distinct family ; but then he regards 

 the Carps, tlie Salmons, the Herrings, the Pikes and the Flying fishes, as 

 ' subfamilies' only of Salmonidce ! Though why he distinguished Esocince from 

 Exoccetince does not appear, unless to complete his magic ' circle' of five; for 

 he describes Esox under Exoccetince ! In like manner, he tried (of course) to 

 form a ' circle of five' of his Cobitidce, but most unsatisfactorily, and with 



