74 
Family XIX. HYODONTIDE. 3 
Genus 87. Hyopon, Le Sueur. 
Moon Eves. 
64. Hyodon tergisus, Le Sueur.—Moon Eye; Toornep Herrine. 
A moderately common fish in the Illinois, Mississippi and Ohio 
Rivers, but not occurring in smaller streams. 
| 
65. Hyodon alosoides, Raf. 
Taken by us only in Galena River, in extreme Northern Tlinoil 
Order VI. EVENTOGNATHI. 
Family XX. CYPRINIDA. (THe Mrixnows.) 
Genus 38. Notremiconus, Raf. 
66. Notemigonus chrysoleucus, Mitech.—Goupen SuHiner; Bream. 
In Illinois this species occurs everywhere, in waters of all de- 
scriptions—lakes, ponds, creeks and rivers, although most abundant 
in small ponds and muddy creeks. | 
Genus 39. Opsopaopus, Hay. 
67. Opsopwodus emilia, Hay. 
(Synop. 247; Opsopwodus emilie, Trycherodon megalops.) 
This species has occurred sparingly in our collections throughout 
the State, and only in running streams or in lakes immediately 
connected’ with them. Very abundant in ponds near Mt. Carmel. 
Genus 40. Squatius, Bonaparte. 
Dace. 
68. Squalius elongatus, Kirtland.—Rerp-sipED SHINER. 
Said by Dr. Jordan to oceur in Lake Michigan and in Rock 
River. Not seen by us from Illinois. 
Genus 41. Semorinus, Raf. 
69. Semotilus dissimilis, Kirtland.—Srorrep SHrnER. 
(Bul. Ll, 72; Ceratichthys dissimilis: Synop. 216; Ceratichthys 
sterletus.) 
Has occurred in Illimois only in rivers and in lakes immediately 
connected with them. It has been collected by us in the Rock, 
Illinois and Ohio. ; 
* 
