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Genus 68. Norurus, Raf. 
STONE Cats. 
120. Noturus flavus, Raf.—Common Srone-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. 
(Bul. If, 68; Noturus sialis.) 
This species occurs throughout Illinois, but has been confined 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. 
(Tue Bony Ganorps.) 
Order VIII. HALECOMORPHI. 
Family XXIII. AMIIDA. 
Genus 64. Ama, L. 
124. Ama calva, L.—Mup-Fisu; Doa-risH; GRINDLE. 
Very abundant throughout the State, in the lakes and larger 
streams, and also common in ponds in Southern Illinois. q 
Order IX. GINGLYMODI. 
Family XXIV. LEPIDOSTEIDA. (Tue Gar Pixzs.) 
Genus 65. LirHouepris, Raf. 
125. Litholepis tristeechus, Bloch & Schneider.—Auuicator Gar. 
(Bul. II, 69. Litholepis spatuia.) 
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. | 
