198 CLASS XIV. 



Sp. Acerina vulgaris Cuv., Perca cernua L., BLOCH Ichth. Tab. 53, fig. i, 

 Skandinav. Fiskar, Tab. I, fig. 2 ; the ruffe, (commonly 6", perhaps never 

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

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

 comp. J. C. SCH.EFFER Piscium Bavarko-Ratisbonensium Pentas. Ratisbonae, 

 1761, 4to. 



Centropristis Cuv. (and Aulacocephalus SCHLEG., Faun. Jap.). 

 Grystes 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. et VAL. Poiss. in. PI. 43. 



Rypticus Cuv. Operculum and prseoperculum 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 marine fish 

 9" long, from South America. 



B. Two dorsal fins. 



a) Some larger conical teeth in jaws interposed, with tJie rest thin, 

 crowded. 



Etelis Cuv. Dorsal fins contiguous. Margin of praeoperculum 

 with very fine denticles. 



Sp. Etelis carlunculus Cuv. et VAL. Pom. n. PI. 18, GUERIN Iconogr., Poiss. 

 PL II. fig. i ; at the island of Mauritius. 



Niphon Cuv. Dorsal fins contiguous. Operculum with three 

 sharp spines; praeoperculum denticulate with angle produced into j 

 a spine running backwards. Cheeks and opercles scaly. Head 

 acuminate. Body elongate. 



Sp. Niphon spinosus Cuv. et VAL. Poiss. n. PI. 19, Faun. Japon., Pise. 

 Tab. i. 



Lucioperca Cuv. Dorsal fins approximate or contiguous. Mar- 

 gin of prseoperculum denticulate, the inferior denticles larger. 

 Body elongate. 



