104 GENUS CATOSTOMUS. [Octobeg'. 



minal Jim almost as long as the pectoral; anal fin very 

 small and truncated; caudal fin large and bifurcated, with 

 pointed lobes; 'the dorsal fin is about one third the length 

 of the whole animal; scales large, flexible on the flanks, 

 and a little quadrangular towards the tail; lateral line al- 

 most straight; the skin beneath the great rays of the pec- 

 toral fins is callous. 



In an individual of two feet long, the head measured 

 three inches to the tip of the snout. The colour of the 

 specimen described could not be ascertained, in conse- 

 quence of its being in a dried state: it forms a part of the 

 collection of the Academy of Natural Sciences of Phila- 

 delphia. 



P. 16.— V. 10.— D. 32.— A. 8.— C. 18 rays. 



With the exception of the C. Cyprinus, this is the 

 largest species that I have seen. It was discovered in the 

 river Ohio, by Mr. Thomas Say. 



11. C. vittatiis, A black stripe passes from the snout^ 

 through the eye, to the caudal fin, dividing the body equal- 

 ly; dorsal fin quadrangular; tail forked. 



Body very small, slightly compressed, elevated in the 

 centre above; back pale yellowish red, abdomen and 

 lower fins white; mduth small, lower lip very easily pro- 

 truded forward, as if by means of a spring, when the ani- 

 mal takes its food; scales very small, rounded. Length of 

 specimen two inches. 



P. 16.— D. V. 9.— A. 8.— C. 18 rays. 



This remarkable little species was found in Wissa- 

 hickon Creek, near Philadelphia, by Reuben Haines, cor- 

 responding Secretary of the Academy of Natural Sci- 

 ences. 



