6, ACHAKNES, 369 



Snout equal in length to the diameter of the eye, not convex. Den- 

 ticulations of the pi-aeorbital very distinct. Uniform greenish-olive. 

 (BI.) 



Rivers of Java and Sumatra. 



3. Catopra grootii. 



Sleeker, Blitong, p. 90. 



D. j|. A. |-. L. lat. 30. L. transv. 15. 



The height of the body is twice and three-quarters in the total 

 length. Snout convex, equal in length to the diameter of the eye. 

 Denticulations of the prseorbital scarcely visible. Uniform greenish- 

 olive. {Bl.) 



Eivers of Blitong and Banka. 



Third Group. ACHARNINA. 



6. ACHARNES. 



Acharnes, Midi. S,- Trosch. in Schomb. Rets. Brit. Guyana, iii. p. 622, 

 and Hor. Ichthjul. iii. p. 27. 



Body compressed, oblong, covered with small scales. Mouth 

 protractile. Bands of small teeth in the jaws ; none on the palate. 

 Bones of the head not armed. The dorsal fin is notched, its spinous 

 portion being of rather greater extent than the soft, and composed 

 of sixteen spines ; the anal fin with three spines, and with the soft 

 portion simUar to the soft dorsal fin ; ventrals thoracic, composed of 

 one spine and five rays. Lateral line interiiipted. Five branchio- 

 stegals ; pseudobranchiae hidden, foui* giUs ; an aii--bladder. 



Fresh waters of British Guiana. 



1. Acharnes speciosus. 



Mail. Sf Trosch. I. c, and Hur. Ichthyol. iii. taf. 5. fig. 3. 

 D. % A. ^. L. lat. 95. 



10 11 



Brownish, with a black stripe along the middle of the caudal fin. 

 {M. 4- T.) 



Mouth of the Essequibo. 



