242 TELEOSTEI. PHTSOSTOMI. 



Mouth oblique, lower jaw wilh 1 central 



and on either side a lateral prominence 



fittinginto corresponding emarginations 



in the upper jaw ; a pair of rostral 



barbels or none. Pharyngeal teeth in 



3 rows. Dorsal fin without any osseous 



ray. Scales large or of moderate size. 21. RASBOHA. 

 Mouth small, inferior; lower jaw with a 



sharp crescentic edge but no 'lip ; no bar- 

 bels. Pharyngeal teeth iu 2 or 3 rows. 



Dorsal fin without osseous ray. Scales 



of moderate size 22. ASPIDOPAIUA. 



c. Dorsal fin commencing above the inter- 

 space between the ventral and the anal, 

 generally extending to over the latter, 

 which is of moderate length or elon- 

 gated (7 to 33 branched rays). 



Mouth anterior ; lips thin. Pharyngeal 

 teeth in 3 rows. Dorsal fin with 

 an osseous serrated ray ; anal elongated. 

 Scales small 23. ROHTKK. 



Mouth anterior or oblique, with a deep 

 cleft; jaws compressed. Pharyngeal 

 teeth in 2 or 3 rows. Dorsal fin with- 

 out osseous ray. Scales of moderate or 

 of small size. Lateral line concave . . 24. BAUILTUS. 



Mouth directed obliquely upwards ; cleft 

 shallow ; mandibles rather broad. 

 Pharyngeal teeth in 3 rows. Dorsal 

 fin without osseous ray and extending 

 to above a long anal. Scales of 

 moderate size. Lateral line concave .. 25. DANTO. 



B. A portion or the whole of the abdominal 

 edge cutting. 



Mouth directed obliquely upwards ; no 



barbels. Pharyngeal teeth in 3 rows. 



Dorsal fin without osseous ray, inserted 



over the anterior anal rays. Scales of 



moderate size. Lateral line concave. . 26. PERILAMPUS. 

 Mouth directed upwards with a knob 



above the symphysis of the lower jaw ; 



no barbels. Pharyngeal teeth in 2 or 



3 rows. Dorsal tin without osseous 



ray, a portion or the whole situated 



above the anal ; pectorals long. Scales 



of moderate or small size. Lateral line 



concave 27. CHELA. 



1. Genus HOMALOPTERA, v. Hasselt. 

 Syn. Balitora, Gray ; Platycara, McClelland ; Octonema, Martens. 



Head and anterior part of body depressed ; snout more or less 

 spatulate. Mouth small, inferior, with two pairs of rostral barbels, 

 and one or two at either angle of the mouth. Pharyngeal teeth 





