CHAPTER XX. 
THE DISTRIBUTION OF THE FAMILIES OF FISHES, WITH THE 
RANGE OF SUCH GENERA AS INHABIT FRESH WATER. 
Sub-class I. — TELEOSTEL 
Order L—AGANTHOPTERYGIL 
Family 1. — GASTEROSTEIDiE. (1 Genus, 11 Species.) 
“ Fresh- water or marine scaleless fishes, with elongate com- 
pressed bodies and with isolated spines before the dorsal fin.” 
Distribution.; — Palsearctie and Xearctic 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. — BERYCIDAE. (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. 
