94 THE CYPRINODONTS. 



symphysis firm, upper jaw protractile. Teeth subconical, strong, sharp, 

 hooked, firmly set, in a single series in each jaw. Pharyngeal teeth stouter, 

 with a more or less pronounced sliouldei'. Eye large, longer than the snout, 

 four fifths of the interorbital space, one third of the head. Scales large, easily 

 lost. Dorsal larger than anal, rays strong, first ray midway from front of 

 eye to base of caudal, seventh or eighth over the first of the anal. Anal 

 smaller, and reaching a little farther back than the dorsal. Ventrals small, 

 bases a little in front of midway from snout to base of caudal, not reaching 

 the anal. Pectorals moderate, tips reaching little backward of bases of ven- 

 trals. Caudal broad, subtruncate, not as long as the head. The intestine 

 extended reaches to the base of the caudal. 



Light olivaceous ; edges of scales darker ; darker on middle of back and 

 toward middle of flank. Belly and lower half of head silvery. A silvery 

 streak along the middle of the flanks. Darker across interorbital space and 

 on occiput. Fins yellowish, or clouded with puncticulations of dark, or uni- 

 form dusky. About half of our collection shows a dark spot, edged by lighter 

 color, at the bases of the anterior dorsal rays. Small specimens have less of 

 the dark color, and have a more pronounced silvery band on the flank. Fre- 

 quently the broad scales on the middle of the side present the appearance of 

 vertical bars of silver. Largest individual two and one tenth inches in 

 length. 



New York to Texas. 



ADINIA. 



Adinia Grd., 1859, P. Phil. Ac, 117. 



Body short, compressed, deep ; caudal pedicel deep ; head rather large^ 

 crown flat ; snout short, pointed ; chin steep. Mouth medium, oblique, open- 

 ing upward ; lower jaws longer, firmly joined ; upper short, protractile. 

 Teeth conical, outer series larger, strong, hooked. Pharyngeal teeth hooked, 

 with a shoulder. Dorsal rather small, originating behind the middle of the 

 body, in advance of the anal. Anal small, not modified to form an intromit- 

 tent organ on the male ; first ray backward of that of dorsal. Anterior rays 

 of dorsal and anal strong, spine-like. Scales large. Intestine short. 



Type A. muttifasciata of Girard. Texas. 



