XX SYSTEMATIC INDEX, 



ORDER IV. ABDOMINAL FISH. 



These have bony gills ; and the ventral fins placed on the belly, 

 behind the thorax. 



15. Salmon tribe. -Have the hindmost dorsal fin fleshy . .page 254 



Common Salmon . . < 255 | Char 257 



Salmon or Sea Trout .... 256 Smelt 258 



Common or River Trout . . ft. | Umber, or Grayling ib. 



16. Pike tribe. Have the upper jaw much shorter than the 

 lower one ; the head flattish above ; and the mouth and 

 throat large , 259 



Common Pike 259 | Gar Pike 260 



17. Flying-fish tribe. Have the pectoral fins as long as the 



body 261 



Common Flying-fish ib, 



18. Herring tribe. Have the belly with a ridge, and generally 

 jagged, or serrate, underneath 261 



Common Herring 262 I Sprat 263 



Pilchard 263 | Anchovy 264 



19. Carp tribe. Have three bony rays in the membrane of 

 the gills 265 



Common Carp 265 I Minow 267 



Barbel ib. \ Dace 268 



Gudgeon 266 Roach ib. 



Tench ib. Bream 269 



Gold-fish 267| 



ORDER V. BRANCHIOSTEGOUS FISH. 



These have their gills without bony rays. 



20. Tetrodon frite. Have no ventral fins; and the belly 

 armed with numerous spines 269. 



Short Sun-fish 269 | Globe Diodon 270 



21. Pipe-fish tribe. Have no ventral fins ; the body covered 

 with a strong crust ; and the snout long, cylindrical, and 

 turned up at the end 270 



Shorter Pipe-fish ........ 270 | Sea-horse Pipe-fish 271 



22. Sucker tribe. Have two ventral fins, united into an oval 

 concavity, which forms an instrument of adhesion 2?1 



Lump Sucker . . . . 272 



