354 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



front, its tip on the level of the pupil. Lower jaw very deep, its depth 

 half its length. Maxillary extending to somewhat past the vertical 

 from the front of the pupil, its length 2 in head. 



Both jaws with small teeth, which appear to be permanent ; teeth 

 present also on palatines, pterygoids, and tongue, the teeth on the 

 pterygoids very conspicuous, forming a large patch. 



Eye large, 3 in head. Cheeks much longer than deep, not as deep as 

 eye, the anterior margin of the preopercle very oblique. Opercle short 

 and deep, shorter than eye, its posterior margin nearly vertical. Cheeks 

 and opercles marked with fine, but distinct, branching striie. 



Gill-rakers rather short, slender, and close-set, about 30 below the 

 angle of the arch. Longest gill-raker about half diameter of eye. 



Scales firm and adherent, their posterior margins less convex than 

 usual, rough with small fine teeth. Scales before dorsal similar to the 

 others, but much smaller. Belly sharply compressed, the scutes strong, 

 especiallj' behind ventrals. 



Distance from snout to dorsal 2f in length. Dorsal fin about as high 

 as long, its free margin concave, its last ray slightly longer than that 

 wliich precedes it. Length of anterior rays of dorsal 1^ in head. Caudal 

 well forked, the lower lobe slightly the longer, about as long as head. 

 Anal low. Ventrals 2 in head; pectorals 1^. 



Color bluish above, silvery below ; fins all pale; a round black spot 

 behind upper part of gill-opening. 



3. Clupea, sp. incog. 



2534. A single young herring in poor condition, not belonging to any 

 species known to us, but not in condition for description. 



4. Pristigaster ? sp. incog. 



15443. A young specimen in very bad condition, which we are unable 

 to identify with any of the known species of this type. 



Body elongate, with a very distinct silvery stripe. Lowerjaw strongly 

 projecting, its teeth very strong, much stronger than upper teeth. Ven- 

 tral outline not very prominent, strongly serrate. Ventral fins now 

 wanting, but perhaps destroyed. It may possibly be a species of Cliiro- 

 centrodon. 



5. Synodus scituliceps Jor. & Gilb. 



A single young specimen in bad condition, apparently belonging to 

 this species. 



6. Characodon furcidens, sp. uov. 



9571, 30971. Many specimens, in fair condition, except that the colora- 

 tion has faded ; the largest 3 J inches in length. 



Head 4 in length ; depth 3f. D. 15 to 17 ; A 13. Scales about 50-15. 



Body of a form diflerent from that of the species of Cyprinodon; 

 comparatively elongate, not greatly compressed, the head rather low 

 and broad, depressed ; the profile rising evenly from the tip of the snout 



