0. CURIMATUS. 291 



abramoides, Kner. Also, the authors of the ' Horae Ichthyologicae ' 

 appear to have examined a distinct species, if their specimens really 

 had thirteen anal rays. 



D. 11. A. 10*. V. 10-11. L.lat. 56. L. transv. 15/9. 



The height of the body is two-fifths of the total length (without 

 caudal), the length of the head two-sevenths. The upper profile is 

 slightly concave above the occiput. Eye with a broad anterior and 

 posterior adipose lid. The pectoral does not extend to the base of 

 the ventral, and the ventral terminates at a considerable distance 

 from the vent. Caudal fin forked ; the second and third dorsal rays 

 sometimes prolonged into a long filament. Uniform silvery. 



Guianas, Northern Brazil. 



a-b. Fine specimens. River Capin (Para). Purchased of Mr. Stevens. 



8. Curimatus essequibensis. 



Anodus cyprinoides, Mull. Sf Trosch. Hor. Ichth. iii. p. 7 (non auct.). 



J). 11. A. 12-13 (the first rudimentary ray included). V. 10. 

 L. lat. 51. L. transv. 12/9. 



Very similar to C. cyprinoides. 



The height of the body is contained twice and two-fifths in the total 

 length (without caudal), the length of the head thrice and one-third. 

 The upper profile is slightly concave above the occiput. Snout shorter 

 than the eye, broad ; the diameter of the eye is two-thirds of the 

 width of the interorbital space. Eye with a broad anterior and pos- 

 terior adipose lid. Caudal fin forked, the lobes being a little longer 

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

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

 at some distance from the ventral, its length being contained once 

 and three-fourths in that of the head ; the ventral does not extend 

 to the vent. Abdomen angular before the ventral. Uniform silvery, 

 back bluish. 



Essequibo. 

 a-b. Five and a half inches long. From Mr. Ehrhardt's Collection. 

 These specimens have the anterior dorsal rays not prolonged. 



9. Curimatus schomburgkii. 



D. 12. A. 11-12. L. lat. 55. L. transv. 13/8. 



Similar to C. cyprinoides.: 



The height of the body is contained twice and a half in the total 

 length (without caudal), the length of the head thrice and one-third. 

 The upper profile is distinctly concave above the occiput. Snout 

 shorter than the eye ; eye with a broad anterior and posterior lid. 

 Intermaxillary broad, the cleft of the mouth being quite at the lower 

 side of the snout. Caudal fin forked, the lobes being as long as the 



* In this number the first rudimentary ray is included ; and the last, which is 

 split to the base, is reckoned as one. 



tr2 



