248 COXTRIBITTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



is slightly decnrved when present on tin- anterior half of the body. 

 The f.uidal tin is Ion g and very deeply furcate. It is contained .'5^-4 

 times in head and body, and the median rays are about two-fifths the 

 length of the longest. The dorsal is high, its longest ray reaching nearly 

 o;- (jiiiie half the distance from front of dorsal to tail. The front of the tin 

 is a little nearer nose than caudal. The pectorals extend about threc- 

 fonrths i he distance to the veutrals, and the latter nearly or quite attain 

 t he vent. 1). I, 7 or 8 ; A. I, 7 or 8; scales 5, 38-40, 4 ; with 15 or 1C rows 

 before dorsal. The pharyngeal bones are thin, and suddenly and 

 broadly dilated at outer third, this part of the bone being nearly -'! times 

 as wide as the inner, and in shape not unlike a horse's jaw-bone. The 

 odontoid process is unusually distinct and high. The teeth are very 

 slender, strongly hooked, and sharply and irregularly eremite, the edge's 

 having a spinose appearance. The scales are crowded, higher than long, 

 a 'id wanting on the anterior half or two-thirds of the breast. Color in 

 ah-ohol yellowish brown, with a faint silvery lustre on sides. A narrow, 

 black band, about one scale wide, extends around the nose, through the 

 upper half of the eye, to the tail, terminating therein the most highly col- 

 or;'d specimens in a narrow vertical bar. The scales above the lateral 

 band are all dark-edged. In all the specimens the dorsal shows a large 

 snbmedian blotch in Iront, crossing about 4 rays. In one this blotch is 

 so enlarged as to include the whole anterior halt' of the fin, except a 

 small space at base, and a second blotch extends similarly across the 3 

 posterior rays, leaving only a narrow pale vertical stripe between. 

 Length o!' largest specimen L'_! inches. Several specimens from the 

 Illinois Iliver at 1'ekinand IVoria, and from Mackinaw (.'reek." (I'\-bcx.) 



107.- NOT KM Hii ON US K;i!inrs.,m-. 



i .s7/7/- 



( K:iliin'si|ur. .Iniirn. <!< I'liysi<|r.r. <!< Cliymir <-t d'Hi-toiic N:it invllr, I'.irU. HI!), -1^1 : 

 !>]) \'iti-iiii-/i>ini:< iiin;:!ii.. K'ni'. Cjfprinus chrysoleitous Mitch.) 



l'.od\ Mibelliptical. strongly compressed, both back and belly curved, 

 the ciii-ves dilfei'cnt : baclv narrowl\ compressj-d : belly behind ventral 

 iins forming a keel, over \vhich the scales do not pass. Tail not keeled. 

 Head small, conic. .Month small, terminal, oblique, normal, without 

 barbels. Scales rather large. Lateral line continuous, strongly de 

 curved. Dorsal tin inserted behind the \en1rals. Anal lin with its 

 base somewhat elongate, of fr ..... '. to IS rays. Teeth 5-5, hooked, with 



