io8 Field Museum of Natural History — Zoology, Vol. X. 



Bryconamericus terrabensis sp. nov. 



Tetragonopterus emperador Regan (not Eigenmann & Ogle), Ann. & 

 Mag. Nat. Hist., 1908, 456 (Rio Grande de Terraba, Costa Rica). 

 I did not obtain any specimens of this species. It differs from the 

 eastern form chiefly in the smaller scales. 



Carlia gen. nov. 



Type Cheirodon eigenmanni Meek. 



Body elongate, compressed; top of head convex; fontenelle large; 

 mouth rather large, the maxillary not reaching posterior margin of the 

 eye; entire edge of maxillary toothed, 2-2 anterior ones denticulate the 

 remaining 6-6 canine, about equally spaced; premaxillary teeth 5-5, 

 denticulate, in one series; teeth of lower jaw denticulate, in one series 

 of 6-6, the last one on each side slightly longer than the others, these 

 followed by 2-2 canine teeth; dorsal fin pointed, high. 



I placed the type of this genus provisionally in the genus Cheiro- 

 don because of the similarity of its anterior teeth to those of that 

 genus. I am indebted to Dr. Eigenmann for suggesting to me that it 

 should be the type of a new genus, being close to Rhoadsia Fowler, 

 and to whom I dedicate the genus. 



Carlia eigenmanni (Meek). 



Cheirodon eigenmanni Meek, Pub. Field Mus., Zool. Ser., x, 191 2, 



70 (La Junta, Costa Rica). 

 La Junta, Costa Rica (6), 60 to 65 mm. 

 Six specimens only of this interesting species were taken at La Junta. 



Brycon guatemalensis Regan. 



Brycon guatemalensis Regan, Biol. Cent. Amer., 1908, 168 (Rio 

 Chisoy, Rio Usumacinta, Rio Motagua, and Lake Izabal, in 

 Guatemala) . 



The dark edges of some of the scales forming irregular dark vertical 

 streaks are very prominent on all Costa Rica specimens obtained by 

 me. 



This species is quite abundant in the deeper portions of the large 

 streams. The larger specimens are very difficult to capture without 

 the use of dynamite. 



Costa Rica River (15), 175 to 365 mm.; La Victoria (8), 105 to 225 



