0. ACHAllKES. 3GS* 



Snout equal in length to the diameter of the eye, not convex. I)cn- 

 ticulations of the prseorbital very distinct. Uniform gTcenish- olive. 

 (Bl.) 



Rivers of Java and Sumatra. 



3. Catopra grootii. 

 Bleeker, 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 oyo. 

 Denticulations of the prteorbital scarcely visible. Uniform greenish- 

 olive. {Bl.) 



Rivers of Blitong and Banka. 



Third Group. ACHARNINA. 



0. ACHARNES. 



Acharnes, Mull, i^- Trosch. in Schomh. llcis. Brit. Guyana, iii, p. G22, 

 and Hur. Ichthijol. iii. p. 27. 



Body C(tmpressed, oblong, covered with small scales, ^louth 

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

 Bones of the head n,ot 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 similar to the soft dorsal fin ; ventrals thoracic, composed of 

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

 stegals ; pseudobranchiae hidden, four gills ; an air-bladder. 



Fresh waters of British Guiana. 



1. Acharnes speciosus. 

 Miill. Sf Trosch. I. c, and Hur. Ichthyol. iii. taf. 5. fig. .'}. 

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



10 11 



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

 (i¥. 4- T.) 



Mouth of the Essequibo. 



VOL. III. 



