26 



MEMOIES OF THE CARNEGIE MUSEUM. 



Elongate, compressed-fusiform ; dorsal and ventral profiles regularly and about 

 equally arched; preventral area broad, rounded, with a median series of about 

 seventeen scales; predorsal area rounded, with a median series of about fourteen 

 scales, the regularity of the series broken near the middle; occipital process reaching 

 about one-eighth to one-ninth to the dorsal, bordered by two to three scales; skull 

 smooth, slightly convex; fontanels narrow, the frontal fontanel reaching to above 



Fig. 6. Aphijocharax dentatus Eigemnann & Kennedy, a, outline of head, 9 mm. long, showing size of 

 maxillary in a specimen 68 mm. long; 1, 2, 3, suborbitals, 4, 5, postorbitals. b, outline of top of head showing 

 frontal (/), and occipital (o) fontanels, c, premaxillary, d, maxillary, e, mandible, much enlarged, from a 

 specimen 28 mm. long, 10036, I. U. M. 



the middle of the eye, its length about two and one-half times in the length of 

 the parietal fontanel without the groove; snout pointed, the mouth large, ter- 

 minal, the jaws equal; maxillary in adult reaching to the third suborbital; max- 

 illary-premaxillary border two and one-third times in the head, maxillary relatively 

 much shorter in the young; teeth recurved, slender, acutely pointed, those in the 

 front of the jaws with a minute cusp on each side; premaxillary with seven to ten 

 teeth; maxillary with nine to twenty on more than half of its edge; mandible with 

 thirteen to twenty-one teeth; teeth of the premaxillary and of the front of the 

 mandible all of about the same size; third suborbital in contact with the pre- 

 opercle below and behind; a single postorbital, similar to the third suborbital, its 

 face convex, its posterior margin in contact with the preopercle; upper part of the 

 opcrcle similar to, but smaller than the postorbital. Gill-rakers 7 + 9. 



