448 
GEOGRAPHICAL ZOOLOGY. 
[part IV. 
Europe, Asia, and North America ; Argentina (4 sp.), Mediter- 
ranean and deep seas of Western Europe ; Microstoma (2 sp.), 
Mediterranean, and seas of Greenland ; Salarix (2 sp.), China and 
Japan, in seas and rivers. Salmo, Osmerm, Coregonus, and 
Thymallus , are British genera. 
Family 66.— PERCOPSIDAE, (1 Genus, 1 Species.) 
“ A fresh-water fish covered with toothed scales” 
Distribution. — Lake Superior, North America. 
Family 67. — GALAXIDAE. (1 Genus, 12 Species.) 
“ Fresh-water fishes, with neither scales nor barbels/’ 
Distribution. — The temperate zone of the Southern Hemi- 
sphere. 
The only genus, Galaxias, is found in New Zealand, Tasma- 
nia, and Tierra del Fuego, ranging north as far as Queensland 
and Chili ; and one of the species is absolutely identical in the 
two regions. 
Family 68. — MORMYRIDAE. (3 Genera, 25 Species.) 
“ Fresh-water fishes, with scales on the body and tail but not 
on the head, and no barbels.” 
Distribution. — The Ethiopian Region, 
Most abundant in the Nile, a few from the Gambia, the 
Congo, and Rovuma. The genera are : — 
Mormyrus (1 sp.), Nile, Gambia, West Africa, Mozambique, 
Rovuma ; Hyper opsins (2 sp.), Nile and West Africa ; Mormy- 
rops (4 sp.), Nile, West Africa and Mozambique. 
