PISCES. 179 



Eleginus Cuv. Gape of mouth small, with teeth very thin, 

 arranged in several rows. Branchiostegous membrane with six 

 rays. Anal fin long. 



Sp. Eleginus maclovlnus Cuv., Valenc. Poiss. v. PI. 115. 



Nebris Cuv. Gape of mouth ample, with teeth small, arranged 

 in several rows. Eyes small. Branchiostegous membrane with 

 seven rays. Anal fin small, opposite to the last part of dorsal fin. 

 Caudal fin rounded or rhombic. 



Sp. Nebris microps, Cuv. et Val. Poiss. v. PI. 112, from W. Indies. 



b) Margin of 'prceoperculum denti<yulate or crenate. Ventral Jins 

 thoracic. 



Eques Block. Body compressed, high anteriorly. Teeth sub- 

 ulate, small, crowded. Branchiostegous membrane with seven 

 rays. First dorscil fin high, falcate, second low, long ; this last, as 

 well as caudal and anal fins, scaly. Caudal fin rounded. No cirri 

 under jaw. 



Sp. Eques 2'>unctatus Block. Si/si. Ichtli. Tab. in. fig. 2, Cuv. et Valenc. 

 Poiss. V. PI. 116, from the West Indies, as is also Eques halteatus Cuv., 

 Chcetodon lanceolatus L., Eques americanus Bloch, Cuv. R. Ani., ed. ill., 

 Poiss. PI. 29, fig. 2, which also occurs at Brasil. 



Boridia Cuv, Genus of uncertain position. 



Sp. Boridia grossidens Cuv., Cuv, et Val. Poiss. V. PI. 114, from Brasil. 

 Teeth globose, in several rows as in Sj^ari. 



Sctcena L. Teeth subulate, crowded sometimes only in upper 

 jaw, in a single row in lower. Branchiostegous membrane with 

 seven rays. Anterior dorsal fin short, scarcely or not surpassing 

 the other in height. Caudal fin mostly truncate, or rounded, more 

 rarely emarginate or lunate. 



a) Lovier jaio cirrose. 

 Micropogon Cuv. Cirri very small, few tinder jaw. 



Sp. Scicena undulata, Perca undulata L., Catesbt, Carol. 11. Tab. 3, fig. i, 

 figure re-engraved in Encycl. meth., Poiss. PI. 54, fig. 209 ; N. America in 

 the large lakes. The other species also of this sub-genus are from the 

 western hemisphere. 



Pogonias Cuv., Lac. Several slender cirri, by the sides of lower 

 jaw. Pharyngeal teeth globose, large. 



12-2 



