160 CLASS XIV. 



Porthmeus Cuv., VALENC. 



Nauclerus Cuv., VALENC. 



Psenes Cuv., VALENC. Body oval, compressed. Head obtuse 

 anteriorly, declivous, short. Jaws with thin teeth, in a single 

 row; palatine teeth none. Branchiostegous membrane with six 

 rays. Dorsal fins two, contiguous. Ventral fins thoracic. Scales 

 moderate. 



Sp. Psenes cyanophrys Cuv., VAL. Poiss. ix. PL 265. &c. 



Trachinotus LAC. (Trachinotus and Lichia Cuv.). Body com- 

 pressed, oblong or oval. Teeth thin, crowded in jaws and palate. 

 Branchiostegous membrane with 7 9 rays. An incumbent spine, 

 directed forwards in the anterior part of back, over pectoral fins; 

 several other short free spines, in place of first dorsal fin ; second 

 dorsal fin soft, opposite to anal. Two spines in front of anal fin. 

 Ventral fins short, thoracic. Caudal fin large, deeply bifid, with 

 elongate, produced lobes. 



Sp. Trachinotus glaucus Cuv., Chcetodon glaucus BLOCH, IcUh. Tab. 210, 

 South America, West Indian Sea; Trachinotus amia, Scomber amia L., 

 Lichia amia Cuv., RONDEL. De Piscib. p. -254, Cuv. R. Ani., id, ill., 

 Poiss. PI. 54, fig. 3 ; this species becomes more than 4' long ; it occurs in 

 the Mediterranean Sea and in the Atlantic Ocean as far as the Cape 

 of Good Hope, as does Scomber glaucus L. (Lichia Cuv.), Cuv. et VALENC. 

 Poiss. vin. PI. 234. 



Chormemus Cuv., VALENC. (Scomberoides LAC.). 



(Characters and habit nearly of Trachinotus, but there are several 

 false dorsal and anal finlets. Scales small, lanceolate). 



Naucrates EAFIN. Body elongate, fusiform. Head compressed. 

 Teeth thin, crowded in jaws and palate. Branchiostegous mem- 

 brane with seven rays. Some free spines in place of first dorsal 

 fin. Two spines in front of anal fin. 



Sp. Naucrates ductor Cuv., Gasterosteus ductor L., Scomber ductor HASSELQ., 

 BLOCH Ichth. Tab. 388, Cuv. et VAL. Pom. vin. PI. 232, YAREELL Brit. 

 Fish. I. p. 149 ; bluish, with broad perpendicular darker bands. This fish 

 lives in the Mediterranean Sea and in many parts of the Atlantic Ocean ; 

 and since it follows ships, like sharks, in order to catch what falls over- 

 board, is well known to sailors by the name of the pilot-fish, loots-mannefje, 

 lootse, le pilote, &c. Naucrates indicus Cuv., GUERIN Iconogr., Poiss. 

 PI. 30, fig. r, &c. 





