SYNOPSIS OF THE ABRAXGEMENT OF FISHES. 187 



Exocetus. Mouth simple ; without appendages. 

 Ci/psilurus. Mouth furnished with barbels or cirri. 



Raiiphistojia, Body linear, lengthened ; the jaws very long 



and pointed. 



Eainphistoma. Jaws nearly equal ; no finlets. 



Scmnbresox. Hinder rays of the dorsal and anal forming finlets. . 



Hemiramphus. Upper jaw excessively short. 



Lepisosieus. Upper jaw longest, depressed ; body mailed. 



Litholepes. Snout lengthened j mouth beneath ; body mailed. 



Esox. Body oblong ; snout blunt, broad, and depressed. 



Esox. Body scaly ; mouth very large. 



Galaxias. Scales obsotete ; mouth small. 



Alepocepkalus. Scales large; mouth small; eyes very large; 



Leptodes. Body slender ; head very large and obtuse ; 



teeth enormously long. 



Leptodes. Dorsal fin placed near the head ; caudal forked, 

 Stomia. Dorsal fin near the caudal, which is rounded. 



DiPLOPTERus. Anal fins two ; mouth protractile ; ventrals 

 long, pointed. 



5. Sub-family Mormtrin^. — Branchial aperture resem- 

 bling a spiracle ; mouth remarkably small and vertical, 



MoRMTRirs. Dorsal fin single, short ; snout moderate. 

 Scrophicephalus. Dorsal fin single, very long; snout produced, 



FA3nLT2. PLEURONECTID.^. Flat-fish. 

 Body flat ; the eyes on one side orJy. 



1. Sub-family Pleuronectin-^. — Body short, oval ; mouth 



terminal. 



Pleuronectes. Body obtuse, oval ; dorsal reaching to the 

 eyes ; teeth tessellated. 



HiPPOGLossus. Body more elongated, thicker. 

 PsETTA. Body rhomboid ; dorsal fin reaching to the m.uzzle. 

 Platophrts. Ventral fins confounded with the anal ; eyes 

 remote. 



2. Sub-family Soleax^. — Body lengthened, oval, thick j 



mouth beneath to the muzzle. 



Solea. Caudal fins distinct ; pectorals two. 

 Brachirus. Pectorals two ; dorsal, caudal, and anal united. 

 MoxocHiRus. Pectorals unequal, the under one obsolete. 

 AcHiRus. Dorsal and ventral fins distinct ; no pectorals. 

 Plagusia. Dorsal, caudal, and anal united ; no pectorals. 



