45 2 



EIGENMANN 



Leporinus obtusidens (Valenciennes). 



One specimen. Depth 3.5; head 4.33; interorbital equals 

 snout ; snout conical ; teeth short, truncate ; lateral spots ob- 

 scure, vertical, the caudal spot most prominent; anal concave, 

 the second and third ray reaching much beyond the tip of the 

 last, nearly to caudal. 

 Astyanax rutilus (Jenyns). 



Five specimens. 



D. 11 ; A. 28 in one, 30 in the others; scales 6 or 7-37 to 

 39-5 to 7. 



* Acestrorhamphus brachycephalus (Cope). 



One specimen. D. 10; A. 26 ; head 3.75 ; depth 3.33 ; eye 

 4 in head; scales 1 1-55-9. 

 Acestrorhamphus hepsetus (Cuvier). 



One specimen. 



* Acestrorhamphus ferox (Giinther). 



One specimen. 

 Salminus maxillosus (Cuvier & Valenciennes). 



Three specimens. 



In the older ones the dark lateral lines are much more con- 

 spicuous than in the younger. 

 Serrasalmo marginatus Valenciennes. 



Two specimens. 

 Hoplias malabaricus (Bloch). 



Two specimens. 



clupeid^:. 



Pomolobus ? melanostomus Eigenmann, new species. (Plate 



XXIII, Fig. 6.) 



I am not sure of the identification of this species. It differs 

 from the other American relatives of Clufea in having the 

 dorsal inserted behind the ventrals. 



D. 13 to 16 ; A. 17 to 20 ; head 4.5 to 5 ; depth 3.33 to 3.66 ; 

 ventral serrae strong, beginning near posterior margin of pre- 

 opercle, 26-29. -^ye a ntt ^ e longer than snout, 3 to 3.5 in head ; 

 mouth oblique, the lower jaw included ; maxillary extending a 

 little beyond front of eye ; gillrakers about two thirds as long 

 as eye ; no teeth on vomer ; alimentary canal short, peritoneum 



