338 CHAKACINID^. 



caudal) ; twenty intermaxillary teeth in the outer series, eighteen 

 in the second. Sides of the body with rows of oblique brownish- 

 black spots ; frequently a blackish blotch at the base of the caudal 

 fin. {Kiier.) 

 Panama. 



3. Chalcinopsis chagrensis. 

 Kner, Sitzgsber. Acad. Wiss. Mtinch. 1863, p. 226. 



D. 11. A. 36-37. L. lat. 77-80. L. transv. ^. 



The length of the head is contained five times and a half or five 

 times and three-fourths in the total (with the caudal). Sixteen or 

 eighteen intermaxillary teeth in the outer series, fourteen in the 

 second. Sides of the body immaculate. (Kner.') 



Rio Chagres. 



** Intermaxillaiy teeth, in three series. 



4. Chalcinopsis alburnus. 

 Chalceus alburnus, Giinth. Proc. Zool. Soc. 1859, p. 419. 

 D. 11. A. 35. V. 8. L. lat. 60. L. transv. 13/5. 



The height of the body is equal to, or somewhat less than, the 

 length of the head, and contained thrice and three-fourths in the 

 total (without caudal). The maxillary extends nearly to below the 

 centre of the eye ; snout produced, considerably longer than the eye ; 

 the third mandibulary tooth is the strongest. The width of the 

 interorbital space is a little more than the diameter of the eye. The 

 origin of the dorsal fin is midway between the occipiit and the root 

 of the caudal fin ; its hinder rays are vertically above the anterior 

 anal rays. The free portion of the tail is as long as high ; caudal 

 fin deeply forked ; the pectoral extends somewhat beyond the base 

 of the ventral. Silvery, with a blackish spot on the origin of the 

 lateral line, and with another on its end ; sometimes blackish ver- 

 tical lines all along the side. 



"Western Andes of Ecuador. 



a-e. Types of the species. From Mr. Eraser's Collection. 



26. BRYCONOPS. 



Bryconops, Kner, Denkschr. Acad. Wiss. Wien, 1859, xvii. p. 179. 



Dorsal fin placed in the middle of the length of the body ; anal 

 long ; vcntrals below the anterior dorsal rays. Belly rounded. Cleft 

 of the mouth of moderate width ; teeth denticulated, in a treble series 

 in the intermaxillary, and in a single in the mandible ; maxillary 

 and palate mthout teeth ; no conical teeth behind the front mandi- 

 bulary teeth. Nostrils close together ; gill-openings wide. 



Brazil. 



