292 charactnid^:. 



head. The origin of the dorsal fin is a little nearer to the extremity 

 of the snout than to the base of the caudal. The pectoral extends 

 to, or nearly to, the ventral, its length being two-thirds of that of 

 the head. The ventral does not extend to the vent. Abdomen 

 angular before the ventral. Uniform silvery, back bluish. 

 British Guiana. 



a. Six inches long. British Guiana. Presented by Sir R. Schom- 



burgk. — The anterior dorsal rays are a little prolonged. 

 6. Young. British Guiana. Purchased of Mr. Leadbeater. 



c. Eleven inches long : skin. Demcrara. From the Collection of 



the Zoological Society. 



d. Half-grown. British Guiana. Purchased of Mr. Scrivener. 



e. Young. 



10. Curimatus ciliatus. 



Anodus ciliatus, Mull. $■ Trosch. Hor. Ichth. iii. p. 25. tab. 4. fig. 4. 

 Curimatus ciliatus, Kner, Denkschr. Acad. Wiss. Wien, 1859, xvii. 

 p. 143. 



D. 12. A. 11. V. 10. L. lat. 57. L. transv. 25. 



The height of the body is contained twice and one-sixth in the 

 total length (without caudal), the length of the head thrice and a 

 half. Orbit with an anterior and posterior adipose eyelid ; its diameter 

 is one-half of the width of the interorbital space. The upper profile 

 of the head and nape is convex, without concavity. Belly rounded 

 before the ventrals, keeled behind them. The pectorals terminate 

 at some distance from the ventrals, and the latter at some distance 

 from the vent. Coloration uniform. (M. fy T.) 



Described from specimens 6g inches long ; Essequibo River. 



11. Curimatus vittatus. 

 Kner, Denkschr. Wien. Acad. 1859, xvii. p. 139. taf. 1. flg. 1. 

 D. 11. A. 10*. L. lat. 56-64.. L. transv. i2zL 6 . 



7-9 



The height of the body is one-third of the total length (without 

 caudal), the length of the head two-sevenths or a little less. The 

 upper profile is scarcely concave above the occiput. Eye with a broad 

 anterior and posterior lid. The pectoral does not extend to the base 

 of the ventral ; the ventral is longer than the pectoral, reaching 

 nearly to the vent. Back with dark cross-bands ; a dark band along 

 the lateral line, bordered by a light one above and below. (Kner.) 



Rio Guapore and Rio Negro. 



* In this and in other species described by Kner, the first rudimentary ray 

 does not appear to have been counted. 



