(52 CTPRINID^. 



(without caudal), the length of the head four times. Eye large, 

 nearly as long as the snout, and two-sevenths of the length of the 

 head. Moiith inferior, small, horseshoe-shaped, lower jaw with the 

 lip continuous round its margin. Ventral fins long, longer than 

 pectoral. Coloration uniform. 

 Borneo and Sumatra. 



ff. Typical specimen. From Dr. Bleeker's Collection. 



Although this species differs in a number of well-marked cha- 

 racters from the other, I hesitate to separate them generically, as 

 we have seen a continuous chain of species distinguished by the 

 very same characters in the genus Barbus. 



13. TYLOGNATHUS*. 



Lobocheilus, Van Ilass. 1823 (without characters). 

 Labeo, sp., Cuv. 8f Val. 

 Tylognathus, sp., et Labeo, sp., Heckel. 



Schismatorliynchus, Lobocheihis, sp., Gobionichtbys, et Tylognathus, 

 sp., Bleeker. 



Scales of moderate size. Dorsal fin without osseous ray, with 

 not more than nine branched rays, commencing somewhat in 

 advance of the ventrals. Snout obtusely rounded, the skin of the 

 maxiUary region being thickened, swollen, forming a projection 

 beyond the mouth. Mouth essentially formed as stated in Labeo. 

 Barbels very small, two or four, the maxillary barbels hidden in a 

 deep groove behind the angle of the mouth. Anal scales not 

 enlarged. Anal fin very short. Pharyngeal teeth 5.4. 2 — 2 .4.5, 

 uncinate. 



Snout frequently with tubercles or pores. 



East Indies ; Syria. 



It cannot be denied that the separation of this genus fi'om Labeo 

 is artificial ; but by imiting these two genera, I should have been 

 obliged to abandon the character of a long or short dorsal fin for 

 the definition of other very natural genera of Cyprinoids. Also the 

 skeleton of Tylognathus is distinguished by the same characters as 

 indicated for Labeo (p. 46). 



1. Tylognathus striolatus. 



D. 12. A. 7. L. lat. 58. L. transv. 12/14. 

 A rudimentary barbel at each comer of the mouth. Snout thick, 

 somewhat projecting beyond the lower jaw, without lateral lobe; it 



* 1. Cyprinus dero, Ham. Buck. p. 277, pi. 22. fig. 78. — Brahmaputra. — 

 Two (?) barbels, well developed, at the angle of the mouth. 



2. Gobio canarensis, Jerdon, Madr. Journ. Lit. ^- 8c. xv. 1849, p. 306. — 



Canara. 



3. Cirrhinus burnesiana, M'CMl. Calc. Journ. Nat. Hist. ii. 1842, p. 582, is 



characterized (!) thus: — " Head short, thick, round ; postopercolum (!) 

 narrow and small, lower jaw short, mouth inferior. D. 9. A. 7. 

 Cabul River at Jullalabad." 



4. fasciatus, Jerdon, 1. c. p. .SOS. — Malabar. 



