>fLc 3 Michigan. This species, as defined by Prof. Jordan (Man. Vert. An., 
). 275,, exhibits a great amount of variation, and may eventually be sep- 
irated into two. 
ex- 
Genus Pimephales , Raf. 
74. P. promelas, Raf. Black-head. Apparently rare. I have 
[amine d 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, 
j Mr. E. L Bice, obtained near Evanston, in a ditch. 
y 75. P. milesii , Cope. Approaches very closely to the preceding 
I ! pecies, and one of the central Illinois specimens possesses characters almost 
! ntermediate between the two forms. 
Genus Hyborhynchus , Ay. 
^6. H. notatus , ( Raf I) Ag. Blunt-nosed Minnow. Very numerous 
throughout the state. 
Genus Hybognathus , Ag. 
77 . JEf. nuchalis, Ag. Blunt-jawed Minnow. Apparently rather un- 
common ; a few specimens in the state collection from central Illinois 
j 78. H. argyritis, Grd. Silvery Minnow. Much more numerous than 
bhe preceding. Specimens are in state collection, from central Illinois ; and 
Prof. J ordan informs me that it is common in the larger streams in the 
Vabash and Ohio valleys. 
Genus Ericymba , Cope. 
79. E. buccata , Cope. Silver-mouthed Dace. Very abundant in the 
Vabash valley; but no specimens are in the statd collection from the 
western streams tributary to the Mississippi. 
Genus Semotilus , Raf. 
80. S. corporalis , (Mitch.') Put. Horned Dace. Abundant through- 
out the state. 
Genus Ceratichthys , Bd. 
81. C. oiguttatuS) (Kirt.) Bd. (z=.C.melanotus,Raf.) Horned Chub. 
Abundant everywhere. 
82. C. dissimilis , (Kirt.) Cope. Spotted Shiner. Common in tributa- 
ries of the Wabash and Illinois. 
Genus Rhinichthys , Ag. 
88. R. nasutus , (Ayres) Ag. Long-nosed Dace Occurs in tributa- 
ries to Lake Michigan. (Jordan.) 
84. R. maxillosus , Cope. Sharp-nosed Dace. Two specimens in the 
>tate collection, from Lake Michigan at Chicago, and another, in my col- 
ection, from a small tributary of the lake at Waukegan. This species 
,, s at once distinguished from its relatives, by its long slender form, narrow- 
oointed head and peculiarly shaped head and snout. The body is more 
learly cylindrical than usual in this genus. 
85. R. atronasus , (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. 
