198 CLASS XIV. 



Sp, Acerina vulgaris Cuv., Perca cermia L., Bloch Ichth. Tab. 53, fig. 1, 

 STcandinav. Fiskar, Tab. i, fig. 2 ;. the rvffe, (commonly 6", perhaps never 

 more than 8"), from fresh water in the north of Europe; of an excellent 

 flavour; — Acerina Schraitzer Cuv., Perca ScJircetser L., from the Danube; 

 comp. J. C. ScHiEFFEK Pisclum Bavarico-Ratisboncnsium Pentas. Ratisbonse, 

 1761, 4to. 



Centropristis Cuv. (and Aulacocephalus Schleg., Faun. Jajj.). 



Oi-ystes Cuv. 



Apsilus Cuv. 



Pentaceros Cuv. Body high, trigonal, with belly flattened be- 

 tween the ventral fins remote from each other. A conical tubercle 

 on each side above the eye. Spines of dorsal fin strong. 



Sp. Pentaceros capensis Cuv. ei- Val. Poiss. iii. PI. 43. 



JRt/j)ticus Cuv. Operculum and praeoperculum spinose. Scales 

 very small, concealed under the skin. Dorsal fin long, depressed, 

 with few (3 — 4) spines ; anal fin with only a single very small 

 spine, all the other rays soft. 



Sp. Rypticus saponaceus Cuv. et Val. Poiss. in. PI. 46, a marme fish 

 9" long, from South America. 



B. Two dorsal fins. 



a) Some larger conical teeth m jaws interposed, with the rest thin, 

 crowded. 



Etelis Cuv. Dorsal fins contiguous. Margin of prseoperculum 

 with very fine denticles. 



Sp. Etelis carhunculus Cuv. et Val. Poiss. ii. PI. 18, Gubein Iconogr., Poiss. 

 PI, II. fig, I ; at the island of Mauritius. 



Nijjhon Cuv. Dorsal fins contiguous. Operculum with three 

 sharp spines; prseoperculum denticulate with angle produced into 

 a spine running backwards. Cheeks and opercles scaly. Head 

 acuminate. Body elongate. 



Sp. Niphon spinosus Cuv. et Val. Poiss. 11. PI. 19, Faun. Japan., Pise. 

 Tab. I. 



Lucioperca Cuv. Dorsal fins aj)proximate or contiguous. Mar- 

 gin of prseoperculum denticulate, the inferior denticles larger. 

 Body elongate. 



