CYPRINID^E. CVIII. 297 



forehead, 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. HI. dinemus, (Raf.) Jor. EMERALD MIXXONV. Color- 

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

 slender and less compressed, more elongated than in any 

 other of our CyprinidcB, the depth being only from one- 

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

 eye 3| in head; fins as in preceding; L. 4 to 5. L. Mich- 

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

 others, "going in flocks." (A. jaculus and A. arge, 

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

 type of his genus Minnilus. This species and the two 

 preceding are not very well separated.) 



5. M. micropferyx, (Cope) Jordan. SMALL -FixxED 

 MIXXOAV. 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 5^ to of; 

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



6. M. photogenis, (Cope) Jor. WHITE -EYED SHIXER. 

 An extremely variable species, differing from all of the 

 preceding in the less posterior' position of the dorsal, 

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

 in length; head 4 to 4-j- 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 



