(45) 



of Lake Michigan. This species, as defined by Prof. Jordan (Man. Vert. An., 

 p. "iT'S 1, exhibits a great amount of variation, and may eventually be sep- 

 arated into two. 



Genus Pimephales, Raf. 



74. P. provielasy Raf. Black-head. Apparently rare. I have ex- 

 amined but three specimens from Illinois ; two in the state collection, from 



Bailey's creek, in Central Illinois, and one in the collection of my friend, 

 Mr. E. L. Rice, obtained near Evanston, in a ditch. 



75. F. mi/esii, Cope. Approaches very closely to the preceding 

 species, and one of the central Illinois specimens possesses characters almost 

 intermediate between the two forms. 



Genus Hf/horhynchus, Ag. 



76. H. nofiifiis, ( Raf.) Acf. Blunt-nosed Minnow. Very numerous 

 throughout the state. 



Genus Hyhognatkus, Ag. 

 11. H. nuchalis, Ag. Blunt-jawed Minnow. Apparently rather un- 

 common ; a few specimens in the state collection from central Illinois 



78. JI. ai-gyrifi's, Grd. Silvery Minnow. Much more numerous than 

 the preceding. Specimens are in state collection, fi'om central Illinois ; and 

 Prof. Jordan informs me that it is common in the larger streams in the 

 Wabash and Ohio valleys. 



Genus Erlcj/mha, Cope. 



79. E. huccataf Cope. Silver-mouthed Dace. Very abundant in the 

 Wabash valley ; but no specimens are in the state collection from the 

 western streams tributary to the Mississippi. 



Genus Semofilus, Raf. 



80. S. corporalis, (Mitch.') Put. Horned Dace. Abundant through- 

 out the state. 



Genus Ceratichthys, Bd. 



81. C. h{guttaHis,{Kirt.) Bd. (=zC. melanotus, Raf.) Horned Chub. 

 x\bundant everywhere. 



82. C. dis.<imilis, (Kirt.) Cope. Spotted Shiner. Common in tributa- 

 ries of the Wabash and Illinois. 



Genus Rhinichthi/s, Ag. 



83. R. nasutns, (Ayres) Ag. Long-nosed Dace Occurs in tributa- 

 ries to Lake Michigan. (Jordan.) 



84. R. mcciUoms, Cope. Sharp-nosed Dace. Two specimens in the 

 state collection, from Lake Michigan at Chicago, and another, in my col- 

 lection, from a small tributary of the lake at W^aukegan. This species 

 is at once distinguished from its relatives, by its long slender form, narrow- 

 pointed head and peculiarly shaped head and snout. The body is more 

 nearly cylindrical than usual in this genus. 



85. R. afronasus, (Mitch.) Ag. Black-nosed Dace. Specimens in the 

 state collection, from tributaries of the Illinois ; and others from clear 

 tributaries of Lake Michigan, are in the collection of the author. 



