NORTH AMERICAN FRESH-WATER FISHES. 9 
CYPRINIDZ. Puarn 3. 
HYBOPSIS KENTUCKIENSIS (Rafinesque). 
CERATICHTHYS BLENNIOIDES. Baird. 
The Common Horny-head or River Chub; Indian Chub; Jerker. 
Fig. 1. Side view of skull. 
. Top view of skull. 
. Lower view of skull. 
. Rear view of skull. 
. Scale from the lateral line. 
. Scale from above the lateral line. 
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3 
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5. Outline of section of body at dorsal fin. 
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7 
8. Scale from below the lateral line. 
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. Young example. 
10. Outline of body seen from above. 
11. Male example, not quite full grown. 
12. Lower pharyngeal bones and teeth. 
13. Right lower pharyngeal. 
The Horny-head or River Chub is the most widely diffused of all our fresh- 
water fishes, abounding in almost all waters from New York to Montana, and 
southward to South Carolina and Texas. It frequents rivers and creeks rather 
small brooks. It has no economic value, but is often used as bait for the Black 
Bass. 
