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CHAPTEK XX. 



THE DISTRIBUTION OF THE FAMILIES OF FISHES, WITH THE 

 RANGE OF SUCH GENERA AS INHABIT FRESH WATER. 



Sub-class L— TELEOSTEI. 



Order I.—ACANTHOPTERYGIL 



Family 1.— GASTEROSTEID^. (1 Genus, 11 Species.) 



" Fresh-water or marine scaleless fishes, with elongate com- 

 pressed bodies and with isolated spines before the dorsal fin," 



Distribution. — Palaearctic and Nearctic regions. 



The species of Gasterosteus, commonly called Sticklebacks, are 

 found in rivers, lakes, estuaries, and seas, as far south as Italy 

 and Ohio. Four species occur in Britain. 



Family 2.— BERYCID^E. (10 Genera, 55 Species.) 



" Marine fishes, with elevated compressed bodies covered with 

 toothed scales, and large eyes." 



Distribution. — Tropical and temperate seas of both hemi- 

 spheres. 



Their northern limit is the Mediterranean and Japan. Most 

 abundant in the Malayan seas. 



