FISHES— REGAN. 25 



For the first time our knowledge of the fishes of the coasts of the Antarctic 

 continent is sufficiently advanced to make it worth while to attempt to delimit an 

 antarctic zone, and to divide it into districts. 



For the purposes of reference it may be stated at once that the conclusions I have 



Fu;. 2. — Map showing the mean annual surface isotherms of 6° C. — and 12° C. 



, as calculated by Dr. Schott, respectively approximating to the northern boundaries 



of the Antarctic and Subantaretic Zones ; the extreme limit of pack-ice ^ ^ ^ bounding the 

 Glacial District (G) ; and the Kerguelen (K), Magellan (M) and Antipodes (A) Districts. 



reached are that south of the tropical zone the distribution of coast fishes is best 

 illustrated by the following classification: — 



1. South Temperate Zone, with seven districts: Chile, Argentina, Tristan 

 da Cunha, Cape, St. Paul, Australia,, and New Zealand. 



