THE FISHES OF NEW JERSEY. 139 



aa. Teeth 2, 4-4, 2. 

 e. Anal 7 to 9. 



/. Exposed surfaces of costal scales very narrow; dorsal over 



ventrals ; no. black caudal spot. corxutus 



ff. Costal scales not narrowly imbricated ; dorsal inserted behind 



ventrals ; a very dark lateral band ending in a black caudal spot. 



g. Body rather pale ; lower surface of caudal peduncle pale. 



CHALYBtEUS 



gg. Body deeply colored, dark ; lower surface of caudal peduncle 



dusky. CHALYB.5;US ABBOTTI 



ee. Anal 11 to 12, inserted behind ventrals; scales on side not imbricated. 



AMCENUS 



Notropis bifrenatus (Cope). 



Plate ii. 



Bridled IMinnow. IMinnie. 



Head 4^; depth 4; D. 11, 7 ; A. 11, 6; scales 35 in lateral 

 series to base of caudal, 9 in lateral line; 12 scales before dorsal ; 

 10 scales in an oblique series back from origin of dorsal; snout 

 3^ in head; eye 3; maxillary 4; interorbital space 2j4 : length 

 of depressed dorsal i; of depressed anal 1%; least depth of 

 caudal peduncle 2^^ ; pectoral i^i; ventral i^i] pharyngeal 

 teeth 4-4. Body rather slender, compressed, fusiform. Caudal 

 peduncle long, its least depth about 2}^ in its length, and com- 

 pressed. Head rather convex above, and of moderate size. Snout 

 and muzzle rather obtuse. Eye circular, anterior, rather large. 

 Mouth a little oblique, small, and mandible inferior or included. 

 Maxillary short, not reaching orbit. Nostrils conspicuous, supe- 

 rior, near eye. Interorbital space broad and convex. Gill-rakers 

 2 + 5 rudimentary weak denticles. Scales of more or less uni- 

 form size or with uniform exposed surfaces not narrowly im.bri- 

 cated. Lateral line barely extending to dorsal, of simple tubes, 

 and sloping down a little. Origin of dorsal much nearer tip of 

 snout than base of caudal, and depressed fin much less than half 

 of space to latter. Anal inserted a little behind base of last dorsal 

 ray, and reaching half way to base of caudal. Caudal forked, 

 longer than head, and lobes rather rounded. Pectoral low and 



