Storer's Synopsis of the Fishes of North America. 37 



GENUS XII. RYPTICUS, Cuv. 



A single dorsal fin. Small spines on the opercles ; scales small, and con- 

 cealed beneath a thick epidermis. The species have been called Savonniers 

 by the French, in consequence of their soft and soapy surface, which feels as 

 if it had been lubricated by some unctuous matter. 



1. Rypticus saponaceus, Bloch; 



Oblong and compressed. Of a blackish color, verging to violet ; its whole surface covered 

 with very small elliptical scales, which, through the microscope, exhibit radiating striae, 

 and are crenulated at the edges. 



D. 3-25. P. (?). V. (?). A. 17. C. 17. Length, 8 or 9 inches. 



Caribbean Sea, Gulf of Mexico, Cuv. 



Jabonsillo, Parka, p. 51, pi. 24, fig. 2. 



Le Savonnier common (Ryplicus saponaceus, Cuv., Anthias saponaceus, Be), Cuv. et Val. . m. p. 63. 



GENUS XIII. CENTRARCHUS, Cuv. 



Have an oval, compressed body ; a single dorsal fin. Velvet-like teeth in 

 both jaws, before the vomer, upon the palatines, and upon the base of the 

 tongue ; the preoperculum entire ; the operculum divided at its angle into two 

 flattened points. 



1. Centrarchus aeneus, Lesueur. 



Coppery, occasionally tinged with green. Head and back dusky olive, blotched irregu- 

 larly with darker spots; the jaws, lips, and throat, dusky ; the thorax bluish or steel-gray. 

 The spinous portion of the dorsal fin is longer than the membranous portion, and half of its 

 height. 



D. 12-11. P. 16. V 1-5. A.6-10. C. 17. Lesueur. Length, 7 to 10 inches. 



D. 11-11. P. 14. V.l-5. A.6-10. C. 17. Cuv. et Val. 



D 11-11. P. 14 V.l-5. A 6-10. C. 175. Richardson. " 



D. 11-11. P. 16. V.5. A.6-10. C 17|. Kirtlanb. 



D. 11-12. P. 14. V.l-5. A. 6-11. C. 17g. Dekay. 



Lake Erie, Lesueur. Lake Ontario, Cuv. Lake Huron, Richardson. Lake Cham- 

 plain, Dekay. Almost every permanent 6tream in Ohio, Kirtland. 



Called "Rock Bass," "Goggle-eyed Bass," "Black Sun-fish," in Ohm. "Rock 

 Bass," in Lake Champlain. 



C chla renea, Lesueur, Journ. Acad. Nat. Sc., n. p. 'ill. fig, 



Le Centrarchus bronze, Centrarchus a?neu*. Cuv. et Val, hi. p. 34. 



Bi ril f lenlrarchus, Rich , Fauna Boreal. An.er., mi I 



Cichla a nen, Rock Bass, Kibtland's Report on IheZobl of Ohio, pp. II 

 Centrarchus ffineus, Fresh-walec Bass Dekay's Report, \> 27, pi 11, fig 4. 



" Kirtland, Cost. Journ. Nat Hist., iv p. 239, pi. II, fig. I. 



