a* 



six inches. Good to eat. Eyes black, iris silvery. Diameter 

 three tenths of the length. Head gilt above. Pectoral fins 

 reaching ihe vent Scales deciduous and a little ciliated. End 

 of the tail biackish. Spiny rays of the anal and dorsal fins 

 gradually longer, but shorter than the soft rays, which are also 

 gradually decreasing; the dorsal has only 1 4, while the anal has 

 16 such rays. Caudal 28. Thoracic one and five. 



VII Genus. Red-eye. Aplocentrus. Ajiloccntre. 

 Body elliptic, compressed. Head small, jaws with lips and 



teeth, opercule smooth and flexuose. Vent medial. One longi- 

 tudinal dorsal fin with only one spine. 



A singular genus, intermediate between La&rus, Cynedus y 

 and Coryfi/ima; but belonging to the family of Labrides. The 

 name means single spine. I describe it from a drawing made 

 by Mr. Audubon. It i* also the 1 1th genus of my Prodromus. 



19th Species. Ohio Red-eye. Afilocentru* calliope. Ap- 

 loccntre belaeuil. 



Pale greenish above, with some flexuose transversal blaclc 

 lines, yellowish beneath the lateral line, and with -some small 

 black lines, whitish and unspotted beneath: iris red: forehead 

 flexuose convex: upper jaw hardly longer: dorsal spine longer.- 

 tail fiabelliform: lateral line straight. ._ 



A beautiful fish from eight to twelve inches long. It lives in 

 the lower parts of the Ohio, in Green river, Sec. Vulgar names 

 Red-eyes, Bride pcarch, Batchelor's pearch, Green bass, &c. 

 Breadth about one fourth of the length. Dorsal fin beginning 

 behind the head with a long spiny ray and ending close to the 

 tail, variegated with flexuose black lines: broad at the base, 

 depressed near the tail, and suddenly broad again at the end, 

 Anal fin small. Thoracic fin triangular. Lateral line rather 

 broad. Iris large and red. Tail unspotted, and with rounded tip 

 ©r fan-shaped. _ 



VIII Genus. Baubot. Pogostoma. Barbotte. 

 Body oval, compressed. Head small, jaws equal, without 



teeth, but with lips and six barbs, two to each lip and two to 

 the lower jaw: opercule smooth, rounded. Two distant dorsal 

 fins. 



A fine genus next to Difitcrodon and C/ieilodifiterus; it bo- 



