40 crrRiMDiE. 



between the lateral line and the ventral fin. The height of the body- 

 is contained thrice and a half in the total length (without caudal), 

 the length of the head four times and a third or four times. Colora- 

 tion uniform : upper margin of the dorsal fin and a band along the 

 middle of each caudal lobe blackish. 



Borneo. 

 a. Kahajan. From Dr. Blceker's Collection. 



10. OSTEOCHILUS *. 



Rohita, sp., Cuv. 8f. Val, Blkr. 



Scales rather large. Dorsal fin without osseous ray, with from 

 thirteen to twenty-one rays, commencing in advance of the ventrals. 

 Snout obtusely rounded, maxillary region scarcely thickened, and 

 but slightly projecting beyond the mouth. Mouth transverse, in- 

 ferior or subinf'erior, with the lips more or less thickened, fringed or 

 crenulated ; instead of the inner fold, as described in Laheo, the 

 osseous part of the mandible forms a hard sharp transverse promi- 

 nence ; no symphysial tubercle. Barbels small, nearly always four. 

 Anal scales not enlarged. Anal fin very short. Pharj-ngeal teeth 

 5.4, 2—2 .4.5. 



Snout sometimes with homy tubercles which periodically fall off, 

 leaving their former bases as shallow round depressions (pores). 



East-Indian archipelago. 



1. OsteocMlus melanopleurus. 



Rohita melanopleura, Bleeh. Kaf. Ti/dschr. Ned. Ind. iii. p. 430 ; or 

 Prodr. Cypr. p. 1G3 ; or Atl. Ichtfujol. Cypr. p. 62, tab. 13. 



D. 19-21. A. 7. L. lat. 45-55. L. transv. 11-12/11. 

 Seven or eight longitudinal series of scales between the lateral 

 line and ventral fin. Snout without pores. Barbels well developed, 



* 1. Labeo cephalus, C. # V. xvi. p. 347, pi. 487.— Pegu.— D. 16. L. lat. 36. 

 — The reason why I am inclined to refer this fish to the present genua, 

 is because Valenciennes describes its mouth thus : " La maelioire ini'e- 

 rieure a son bord droit taille en biseau transversal." Yalenciennes's 

 genus Rohifa is very distinct from Osfeochilus, although it contains three 

 or four species of the latter. The genus here proposed agrees more 

 with Bohifa (Blkr.), but this ichthyologist has mixed up many other 

 species which I consider to be Laheones ; he also does not allude to the 

 peculiarity of the genus, viz. the sharp lower jaw, inside the lip, nor 

 has he observed that this genus appears to be restricted to the Archi- 

 pelago. 



2. Dangila lipocheila, C. ^ V. xvi. p. 232 (part.) ; Bleck. Prodr. Cypr. 



p. 20.3, and Atl. Ichthyol. Cypr. p. 48, tak 7. fig. 1. — Java. — Bleeker 

 says that this name was first given by Kuhl and Van Hasselt to a 

 fish of which they have left a drawing copied by Bleeker ; it would 

 appear to have D. 2/18 and L. lat. 32. Bleeker thinks that it has been 

 confounded by Talenciennes with Barhichfhys la vis, with which his 

 description agrees better, tlian with the JD. lipochcihis of Kuhl and 

 Van Ha.sjelt. 



3. Cyrene cyanopareia, Hecke.l, in Russegger's Reisen, i. p. 1025. — Philip- 



'pme Islands. — D. 20. L. lat. .j.i. 



