The Geographical Distribution of Fishes 105 
gascar or Cape Colony, but in all these regions the essential 
character of the fish fauna remains the same. 
Southern Zone.—The third great region, the Southern Zone, 
is scantily supplied with fresh-water fishes, and the few it pos- 
sesses are chiefly derived from modifications of the marine 
fauna or from the Equatorial Zone to the north. Three districts 
are recognized—Tasmania, New Zealand, and Patagonia. 
