ZEIBJE. ZEIN^. 249 



Caranx Lac. Body oval, or oblong-oval, broad, compress- 

 ed; lateral line on the fore part arched, on the hinder 

 part straight, carinated, and armed with loricated 

 prickly scales, gradually becoming larger as they 

 approach the caudal ; dorsal fins two, the first small 

 and low ; two detached spines before the anal ; pec- 

 toral long, falcated ; scales minute. 



1. Dorsal and anal more or less falcated ; body short. 



C. chrysophrys. Cuv, pi. 247. 



2. Dorsal and anal rays prolonged into filaments. 



( Olistus. Cuv. ) 



3. Ventral fins very long. Russell, pi. 152. 



4. Forehead gibbous. C. Ascensionis. Cuv. pi. 249. 



5. Body lengthened, as in Trachinus ; pectoral very long ; 



ventrals small. 



ruber. Bloch, pi, 342. 



Trachinus Sw. Body fusiform, lengthened ; lateral line 

 slightly curved near the head, and strongly loricated 

 nearly its whole length ; first dorsal fin as high as 

 the second, which sometimes has finlets. 



1 . Plates extending the whole length of the lateral line. 



T. spinulosus. Cuv. pi. 246. 



2. Plates extending to one half of the lateral line ; tail 



with finlets. 



T. punctatus. Spix and Agass. pi. 56. fig. 1. 



3. Plates near the caudal fin only ; no finlets. 



macrophthalmus. Spix and Ag. pi. 59. a. fig. 2. 

 crumenophthalmus. Bloch, pi. 343 



5. SuBFAM. ZEIN^. Dories. 

 Body short, oval, or rhomboid, very broad in the middle, 

 and excessively thin ; mouth very small, often very 

 protractile ; dorsal fin generally single *, without any 

 detached or recumbent spines placed in front; scales 

 very minute, or none ; caudal forked, f 



Equula Cuv. Body often diaphanous, short, oval ; 

 mouth capable of being projected in the form of a 

 tube, but when shut forming an angle on the throat ; 

 scales either soft and smooth, or altogether wanting. 



Equula Cuv. Dorsal fin single, not emarginate, some- 

 what falcate ; the first rays of the dorsal and ventral 



* Except in Hamiltonia and Platysomus. + Except in Zeus. 



