1G8 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY - IV. 



all plain. Head I ; depth 5. Scales 5-3G-4 ; teeth 4-4. L. 2^ inches. 

 Ohio Valley and la Ice region; generally abundant in small streams. 

 One of the most insignificant of all our fishes. 



Cope, Proc. Acad. Nat. Sci. Phila. 1864,263: Hylopsis stra- 



iiitn<-nx Cope, C'ypr. i'l'iin. :!S1.) 



21O. C. volucclla (Cope) J. & G. 



Body moderately stout. Ilead depressed, elongate, the vertex plane, 

 the muzzle elongate. Fins more elongate than in most of the related 

 speeies, i lie pectorals reaching the veutrals. Caudal peduncle slender. 

 Eye 3^ in head. Olivaceous, a slight dusky lateral shade; no dorsal 

 stripe; lins plain. Ilead 3^-; depth 4. D. 8; A. 8; scales 4-34-3; 

 teeth 4-4. L. 2i inches. Michigan and Wisconsin. 



(Hybognathus rolnccllus Cope, Proc. Acad. Nat. Sci. Phila. 18G4, 283: Ilybopsis volu- 

 ccllus Cnpr, Cypr. Penu. 381: Leuciacua rolucdlm Giiuther, vii, 2(JO.) 



211. C. microstOBsm (Raf.) J. & G. 



Body elongate, the caudal peduncle not contracted. Mouth inferior, 

 horizontal, small, the maxillary not reaching the line of the eye. Fins 

 rather short. Eye large, 3 in head. Fourteen scales before dorsal. 

 I'reorbital bone much longer than deep. Olivaceous, translucent; a sil- 

 very lateral baud, along which is a black speck at the origin of each 

 tube of the lateral line. D. 8; A. 7; scales 5-33-2; teeth 4-4. L. 2 

 inches. Virginia to Kentucky. 



(MiniiiliiN ni'uroxtiiiiuiH K'.-if. Idilli. Ob. 1820,47: Uybopsis lonyiccps Cope, Jourii. Acad. 

 Nai. Sri. 1-liila. ItiW, 331.) 



212. C. lincolata (A^assiz) J. & G. 



Body slender. Ilead short. Muzzle obtuse. Mouth slightly oblique, 

 the jaws equal, the maxillary reaching to eye. Lateral line slightly de- 

 curved. Olivaceous, sides silvery, with dark points along the lateral 

 line, these especially abundant along the sides of the muzzle. Ilead 

 \\: depili 1;. I). s ; A. 7; scales C-34-4 ; teeth 4-4. L. 2 inches. 

 Neltraska tt Colorado. (Cope.) Osage River. ( J^\.s7~.) 



(.llliiiriin- liiiinlnliiN Agassi/, liiill. Mas. Coinp. Zool. l-!'>:!,'.l; /.i-m-'t^-nx tintvlattts Giin- 

 iln-r, - li, .':'.ii : //^//(oy/.si.s- wi/lla C>IM-, JIayilcn's (Jcol. urv. Wyoiu. 1^?^, 438.) 







2i:j. C. mlssorlensls (Cope) J. & G. 



llody stout, with large head and thick caudal ])eduucle. Mouth sub- 

 inferior, somewhat oblique, end of maxillary reaching line of orbit. 

 Twelve scales in front of ! he dorsal I'm. Fins rather long. Eye large, 3 

 in head. Coloration very pale olivaceous; a silvery lateral band and 

 some dusky specks at base of caudal; no dark dorsal line; lins plain. 



