240 TELEOSTEI. PHTSOSTOMI. 



Mouth inferior, with the mandibles loosely 

 joined together; a suctorial disk on 

 the chin ; 4 barbels. Pharyngeal teeth 

 in 3 rows. Scales small, with the vent 

 and base of anal fin enclosed by a tile- 

 like row. Last undivided dorsal ray 

 osseous, sometimes serrated 4. OREINUS. 



Mouth inferior ; mandibles with a sharp 

 horny covering. No barbels. Pharyn- 

 geal teeth in 2 rows. A serrated 

 dorsal ray. Scales present in scapular 

 region, a tile-like row enclosing vent 

 and base of anal fin 5. SCHIZOPYGOPSIS. 



Mouth antero-inferior ; 4 barbels. 

 Pharyngeal teeth in 3 rows. A 

 serrated dorsal ray. Scales small. 

 Vent and base of anal fin enclosed in a 

 tile-like row 6. SCHIZOTHORAX. 



Mouth anterior or inferior; 2 barbels. 

 Pharyngeal teeth in 2 rows. Dorsal 

 with or without a feeble osseous ray, 

 which is sometimes serrated. Scales 

 small ; vent and base of anal fin en- 

 closed in a tile-like row 7. PTYCHOBARBUS. 



Mouth inferior ; lower jaw with a horny 

 covering ; 2 barbels. Pharyngeal teeth 

 in 2 rows. Dorsal fin without any 

 osseous ray. Scales small, not im- 

 bricated ; a sheath to vent and base of 

 anal fin . 8. DIPTYCHUS. 



Mouth anterior or inferior; lips thick, 

 those of the two jaws continu- 

 ous at the angle, and one or both 

 with an inner fold ; sometimes a lateral 

 lobe to the snout ; barbels 4, 2, or none. 

 Pharyngeal teeth in 3 rows. Dorsal 

 fin rather or very elongated and with- 

 out any osseous ray. Scales large, of 

 moderate size, or small 9. LABEO. 



Differs from Labeo in its lips being re- 

 flected from off the mandible, leaving 

 it uncovered as a sharp, hard, trans- 

 verse prominence 10. OSTEOCHILUS. 



Snout somewhat depressed ; mouth more 

 or less inferior; upper lip fringed; 

 lower jaw sharp, covered by a thin 

 lip, and with a tubercle above the 

 symphysis ; barbels 4- or 2.- Pharyn- 

 geal teeth in 3 rows. Dorsal fin elon- 

 gated and without any osseous ray. 

 Scales large, of moderate size, or 

 small 11. DANGILA 



Mouth transverse ; snout somewhat de- 

 pressed; lips thin, those of the two 

 jaws not continuous, a small tubercle 

 above the symphysis of the lower jaw. 

 Barbels 4, 2, or none. Pharyngeal teeth 



