176 CLASSIFICATION OF FISHES, ETC. 



Chirostoma. Mouth nearly horizontal ; head pointed. (A. 

 Humboldtiana Cuv. ) 



4. Sub-family Centronotin-2e. — Body lengthened, oblong. 



Elacate. Body long, slender, with many dorsal spines ; 

 mouth wide ; lower jaw longest. 



* No detached anal spines ; dorsal single. 



Tetragonurus. Scales hard, ciliated, grooved ; mouth sub-vertical. 



Elacate. Scales soft, minute ; lower jaw longest. 



Meladerma. Scales minute, not imbricate ; lower jaw shortest. 



* * Detached anal spines. 



Ckorinemus. Body elongate ; no scales ; tail with finlets. 

 Porthmeus. Body ovate ; dorsal spines almost connected into a fin ; 

 gape opening beyond the eye. 



Centronotus. Dorsal fin single, with isolated spines before ; 



body ovate, oblong ; mouth small. 



Trachinotus. Oblong-oval ; snout short, obtuse, truncate. 

 Centroriotus. Snout rather pointed ; head narrowed ; mouth small. 

 Lichia. Oblong ; mouth large, oblique ; lower jaw longest. 

 Scorpis. Oval, resembling a Chzetodon ; fins scaly ; teeth strong. 

 Naucrates. Sides of the tail with a fleshy keel ; ventrals united to 

 the belly by a membrane. 



Seriola. Dorsal fins two, with an anterior procumbent spine. 



Nomeus. Ventrals very large, united to the belly by a membrane. 

 Temnodon. First dorsal low ; teeth numerous; fins scaly. 

 Seriola. Fusiform ; first dorsal low ; fins naked. 

 Fsenes. Body oval, like a Chslodon ; snout obtuse, truncate. 

 Platylepes. Mouth large, obliquely vertical ; lateral line broad. 



SiGANUs. Dorsal fin long, emarginate ; ventrals with spinous 

 and three soft rays. 

 Siganus. A single procumbent spine in front of the dorsal, 



Trachinus. Pectoral fins large and falcated ; lateral line ge- 

 nerally carinated with imbricate scales ; teeth 

 distinct. 



Trachinus. Body oblong, carinated plates along its whole length. 



C/iaranx. Body thick, oval ; plates jn the tail only. 



Zonichthys. Pectoral small, ventral large; lateral line hardly carinate. 



Alepes. No scales ; head small, rather pointed. 



Micropteryx. Head small ; scales moderate ; lateral line smooth. 



5. Sub-family Zeinje. — Body short, rhomboid, very thin ; 



mouth protractile. 



Equula. Ovate ; mouth very protractile ; dorsal fins one or 

 two ; back with a row of prickles. 

 Hainiltonia. Dorsal fins two ; body diaphanous ; gills serrated. 



Platysomus. Body rhomboid, excessively thin ; no visible 

 teeth or scales. 



Blepkaris. Eyes very large; dorsal and anal attenuated; ventrals 

 %'ery long. 



