98 



Family XIX. HYODONTID^. 



Genus 37. Hyodon, Le Sueur. 

 Moon Eyes. 



64. Hyodon tergisus, Le Sraur. — Moon Eye; Toothed Herring. 



A moderately common fish in the Illinois, Mississippi, and Ohio 

 Rivers, but not occurring in smaller streams. 



65. Hyodon alosoides, Eaf. 



Taken by us only in Galena River, in extreme Northern Illinois. 



Order VI. EVENTOGNATHI. 



Family XX. CYPEINID^. (The Minnows.) 



Genus 38. Notemigonus, Raf. 



66. Notemigonus chrysoleucus, Mitch. — Golden Shiner ; 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. Opsopceodus, Hay. 



67. Opsopoeodus eniilice, Hay. 



(Synop. 247 ; Opsopoeodus emilicB, Trycherodon niegalops.) 



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. Squalius, Bonaparte. 

 Dace. 



68. Squalius elongatus, Kirtland. — Red-sided Shiner. 



Said by Dr. Jordan to occur in Lake Michigan and in Rock 

 River. Not seen by us from Illinois. 



Genus 4L Semotiius, Raf. 



69. Semotiius dissimilis: Kirtland. — Spotted Shiner, 



(Bui. II, 72; Ceratichthys dissimilis: Synop. 316; Ceratichthys 

 sterlctus.) 



Has occurred in Illinois only ia rivers and in lakes immediately 

 connected with them. It has been collected by us in the Rock, 

 Illinois, and Ohio. 



