244 DR. A. GUNTHER ON NEW AMERICAN FISHES. [Mar. 26, 



Three examples, 4| inches long, were collected by Mr. Bartlett on 

 the Huallaga, 



Hemiodus kappleri. 



Allied to H. notatus, but with the body much more elongate. 



D. 11. A. 11. V. 11. L. lat. 64. L. transv. 13/8. 



The scales below the lateral line are much larger than the others ; 

 there are six longitudinal series between the lateral line and ventral 

 fin. The height of the body equals the length of the head, which 

 is two-ninths of the total (without caudal). The depth of the head 

 equals its length, without snout. The distance between the gill- 

 opening and the vertical from the origin of the dorsal is but little 

 less than the length of the head. Origin of the dorsal nearly mid- 

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

 in advance of the I'oot of the ventral. Caudal peduncle longer than 

 deep. Silvery; around l)lack spot above the lateral line, behind 

 the dorsal fin, corresponding to the thirty-fourth scale of the lateral 

 line. Each caudal lobe with a black longitudinal band. 



Two specimens were sent by Hr. Kappler from Surinam. The 

 larger is 9 inches long. 



Leporinus megalepis, Gthr. 



Xeberos. Young examples . have the upper incisors distinctly 

 notched. 



Leporinus frederici, B1. 



An example found by Mr. Bartlett at Xeberos, and 6 inches long, 

 might be taken for a distinct species of Anostomus, as it has the 

 teeth still distinctly notched. The three spots are confluent into an 

 uninterrupted band — a peculiarity which I have also observed in ex- 

 amples from the Essequibo, though in a less marked degree. 



Leporinus hypselonotus. (Plate XXII.) 



D. 10. A. 13. V. 9. L. lat. 37-38. L. transv. 6/7. 



The height of the body is contained twice and one-half or twice 

 and two-thirds in the total length (without caudal), the length of 

 the head four times and one-half or four times and two-thirds. Back 

 much elevated, with its profile very convex to the dorsal fin. Eye 

 nearer to the end of the snout than to that of the opercle ; its dia- 

 meter is one-fourth of the length of the head, less than that of the 

 snout, and one-half of the width of the interorbital space, which is 

 very convex. Opercle two-thirds as long as deep. Incisors strong 

 and broad, the form of their edges varying with the age of the 

 tooth. Lips not fringed. Origin of the dorsal fin equidistant be- 

 tween the end of the snout and the adipose fin. Abdomen com- 

 pressed behind the ventrals. Body with seven more or less broad 

 oblique blackish cross bands ; the two anterior in front of the dorsal ; 

 the third from the anterior dorsal ravs to Ijehind the ventral 



