CYPRINID^.— CVIII. 297 



forebead, etc., rosy in spring; sides sometimes rosy 

 tinted; golden dorsal and lateral stripes, conspicuous in 

 life as in most silvery species; head short, somewhat 

 pointed, 5 in length; depth 5^ to 5^; eye 4 in head; 

 D. I, 8; A. I, 10; lat. 1.'38; L. 4 to 5. Great Lakes and 

 Ohio Valley; abundant in the larger streams; even more 

 graceful in form and delicate in coloration than the pre- 

 ceding. 



4. M. dinemus, (Raf.) Jor. Emerald Minnow. Color- 

 ation exactly as in M. rubellus^ but the body very 

 slender and less compressed, more elongated than in any 

 other of our CypHnidcie^ the depth being oidy from one- 

 sixth to one-seventh of the length; head 4;^ in length; 

 eye 3ig- in head; fins as in jo receding; L. 4 to 5. L. Mich- 

 igan and Ohio Valley, in the larger streams, like the 

 others, "going in flocks." i^A. jacichis and A. arge^ 

 Cope.) (This is Rafinesque's " Emerald Minnow," the 

 type of his genus Mhinilus. This species and the two 

 preceding are not very well separated.) 



5. M. micropteryx, (Cope) Jordan. Small -Finned 

 Minnow. Resembles M. rubrifrons^ but the fins all very 

 low, the ventrals scarcely reaching to the line of the 

 middle of dorsal; head 4|- in length; depth 54- to 5f; 

 lat. 1. 39; L. 3. Tennessee and Cumberland Rivers. 



6. M. photogenis, (Cope) Jor. White -Eyed Shiner. 

 An extremely variable species, difi'ering from all of the 

 preceding in the less posterior position of the dorsal, 

 and in the rather more compressed form; depth 4|^ to 7 

 in length; head 4 to 4^ in length; eye 3^ in head, large 

 and white; olive green; no red pigment; sides silvery; 

 male minutely tuberculate about the head in spring; 

 dorsal fin beginning much nearer caudal than end of 



