TRACHINUS, &C. 169 



Trachinus is of a lengthened form, having the 

 first dorsal fin short, and capable of deflection ; 

 the second lengthened, and with numerous rays. 

 The anal fin stretches nearly the whole length of 

 the body ; the opercle is spined ; the eyes placed 

 near the horizontal surface of the head. They 

 inhabit the European Seas, and are well known 

 to the fishermen for the wounds inflicted by the 

 spines of the first dorsal fin. 



Percis Closely allied to the last. The head 

 more depressed. The dorsal fins completely 

 united ; spine of the opercle small. Several 

 species from the Indian, African, and New Hol- 

 land Seas. 



Pinguipes. Head more lengthened than in 

 the last. The teeth strong, and slightly hooked, 

 covered by fleshy lips ; the dorsal fins connected, 

 and regularly arching ; the ventral fins very fleshy. 

 Inhabits Brazilian Seas. 



Percopis. The form extremely lengthened. 

 Dorsal fins distant ; the teeth in the jaws strong 

 and hooked ; under jaw exceeding the upper in 

 length ; opercle and preopercle without teeth or 

 spines. A single species discovered in the Bra- 

 zilian Seas in the voyage of Frecynet. 



