in the Collection of the British Museum. 479 



the interorbital space. Snout somewhat projecting beyond 

 the mouth. The second suborbital bone is twice and one-half 

 as long as deep. Abdomen flat before the ventrals, compressed 

 behind them. Scales with their entire margin conspicuously 

 serrated. Coloration uniform. 

 Huallaga and Xeberos. 



Curimatus leuciscus. 

 D. 11. A. 9. V. 10. L. lat. 64. L. transv. 



10- 



The height of the body is contained thrice and two-thirds 

 in the total length (without caudal), the length of the head 

 four times. Upper profile of the head and nape straight. 

 Snout a little longer than the eye, which is three-fifths of the 

 width of the interorbital space. Snout somewhat projecting 

 beyond the mouth ; the second suborbital bone is more than 

 twice as long as deep. Origin of the dorsal fin equidistant 

 between the end of the snout and the adipose fin, considerably 

 in advance of the ventrals. Pectoral terminating at a con- 

 siderable distance from the ventral, ventral terminating close 

 to the vent. Abdomen rounded before and behind the ven- 

 trals. Scales with their entire margin conspicuously serrated. 

 Coloration miiform. 



Huallaga. 



Curimatus dohula. 



Allied to C. Troschelii. 



D. 12. A. 10. L. lat. 43. L. transv. 6/7. 



The height of the body is contained thrice and four-fifths 

 in the total length (without caudal), the length of the head 

 four times. Upper profile slightly convex on the nape. Ab- 

 domen rounded in front and behind the ventrals. Snout 

 rather shorter than the eye, the diameter of which is con- 

 tained thrice and one-third in the length of the head, and is 

 less than the width of the interorbital space. The origin of 

 the dorsal fin is nearly midway between the end of the snout 

 and the adipose fin, corresponding to the tenth scale of the 

 lateral line. The pectoral fin terminates at some distance 

 from the ventral. Scales with a few obtuse denticulations. 

 Body silvery ; dorsal fin with an indistinct, oblique, blackish 

 band ascending forwards. 



Huallaga. 



Hemiodus Kafppleri. 



Closely allied to H. notatusy but with the body much more 

 elongate. 

 Surinam. 



