72 



THE AMERICAN CHARACIDAE. 



next above that. The spot is rounded behind, pointed in front, and bordered 

 by a lighter area; horizontal dark lines between successive series of scales. 



Vertebrae 11 +19. 



Posterior air-bladder bent conical, its diameter greater than that of the 

 eye, two and a half in its length; anterior air-bladder one and a half in the 

 length of the posterior. 



Alimentary canal about equal to the length; containing insects and small 

 fishes. 



3. Moenkhausia jamesi Eigenmann. 



Plate 6, fig. 1, Plate 100, fig. 8. 



Moenkhausia jamesii Eigenmann, Bull. M. C. Z., 1908, 52, p. 102 (I<;a; Obidos; Lago do Maximo; Taja- 

 puru); Eigenmann, Rept. Princeton univ. exped. Patagonia, 1910, 3, p. 437. 



Habitat. — Amazon Basin. 



Specimens examined. 



Head 4; depth 2.2; D. 11; A. 32-35; scales 7-35 to 37-5 (to ventrals). 

 Eye 2.4-2.66; interorbital equals eye. 



Deep, compressed, ventral profile slightly more arched than dorsal, sym- 

 metrically rounded; dorsal profile slightly humped at the end of the occipital 

 process; preventral area flattish, with a median series of scales and a lateral, 

 angularly bent series; postventral area compressed, very narrowly rounded; 

 predorsal area narrowly rounded, with a median series of ten scales reaching 

 from the dorsal to the occipital process. 



Occipital process moderate, bordered by four scales on each side; inter- 

 orbital distinctly and evenly convex; second suborbital leaving a narrow naked 

 area; mouth very small, maxillary short and anteriorly convex, not nearly 

 reaching to end of first suborbital, its length equal to that of the snout. Three 

 or four tricuspid teeth in the outer series of the premaxillary, the second or 

 third very slightly removed from the fine; five tricuspid or quinquecuspid grad- 

 uated teeth in the second row; five rather small, graduated teeth in each side of 



