108 



Genus 63. Noturus, Raf. 

 Stone Cats. 



120. Noturus Jiavus, Raf. — Common Stone Cat. 



Rather common in Illinois, in creeks of moderate size. 



121. Noturus exilis, Nelson. 



Rare in this State, only two specimens occurring in our collections 

 besides the original type. Creeks in DeKalb, Woodford, and Union 

 counties. 



122. Noturus miurus, Jordan. 



Taken by us only in Southern Illinois, in the Cache and Wabash 

 Rivers. 



123. Noturus gyrinus, Mitch. 

 (Bui. II, 68 ; Noturus sialis.) 



This species occurs throughout Illinois, but has been conjfined in 

 our collections mostly to lakes, rivers, and large creeks. It is not 

 by any means restricted to rocky situations, but seems rather to 

 prefer the muddy parts of both the rivers and lakes in which it 

 occurs. 



Sub-class HOLOSTEI. 



(The Bony Ganoids.) 



Order VIII. HALECOMORPHI. 



i^'amily XXIII. AMIID.E. 

 Genus 64. Amia, L. 



124. Amia calva, L. — Mud-fish ; Dog-fish ; Grindle. 



Very abundant throughout the State, in the lakes and larger 

 streams, and also common in ponds in Southern Illinois. 



Order IX. GINGLYMODI. 



Family XXIV. LEPIDOSTEID^. (The Gar Pikes.) 



Genus 65. Litholepis, Raf. 



125. Litholcpis tristoechus, Bloch & Schneider. — Alligator Gar. 



(Bui. II, 69; Litholepis spatula.) 



Not common in Illinois, occurring somewhat rarely in the Ohio 

 and Mississippi rivers, occasionally in the Illinois, and in at least 

 a single instance in the Big Muddy, near Carbondale. 



