69 



Order VI. EVENTOGNATHI. 



Family XX. CYPRINID.E. (The Minnows.) 



Genus 38. Notemigonus, Raf. 



€6. Notemigonus chrysoleucus, Mitch. — Golden Shiner; Bream. 



In Illinois this species occurs everywhere, ia waters of all descriptions — 

 lakes, ponds, creeks and rivers, altnough most abundant in small ponds and 

 muddy creeks. 



Genus 39. Opsopceodus, Hay. 



67. Opsopoeodus emilice, Hay. 



(Synop. 247; Opsopoeodus emilice, Irycherodon 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 ia ponds near Mt. Carmel. 



Genus 40. Squalius, Bonaparte. 



Dace. 



€8. Squalius elongatus, Kirthdnd. — Red-sided Shiner. 



Said by Dr. Jordan to occur in Lake Michigan and in Rock River. Not 

 seen by us from Illinois. 



Genus 41. Semotilus, Raf. 

 -69. Semotilus dissimilis, Kirtland. — Spotted Shiner. 



(Bui. 11,72; Ceratiehthys dissimilis: Synop. 316; Ceratichthys sterletus.) 



Has occurred in Illinois only in rivers and in lakes immediately connected 

 with them. It has been collected by us in the Rock, Illinois and Ohio. 



70. Semotilus amblops, Raf. — Silver Chub. 



fBul. II, 62; Ceratichthys amhlops: Synop., 214; do.) 



This fish has been obtained by us not rarely in Illinois, chiefly from the 

 Ohio and the Wabash and the larger tributaries of the latter. 



71. Semotilus biguttatus, Kirt. — Horny Head; River Chub; Jerker. 



(Bui. II, 62; Ceratichthys biguttatus: Synop., 212; do.) 



This species seems limited, in Illinois, to creeks and rivers, and has not oc- 

 curred in our collections south of the center of the State. 



72. Semotilus corporalis, Mitch. — Chub; Horned Dace. 



Almost wholly confined to small streams, in which it is, in Illinois, the 

 most abundant minnow, commonest in those with muddy bottom; but a few 

 have been obtained in the Illinois River, from lakes in the Illinois bottoms, 

 and from the Little Wabash. It ranges throughout the State. 



Genus 42. Playtigobio, Gill. 

 Flat-headed Chubs. 



73. Platygobio pallidus, Forbes. 



A single specimen of this very rare species, obtained in the Ohio River at 

 •Cairo, is the onlj' one hitherto taken. 



