TEMPERATE NORTH ATLANTIC. 263 



1. The fishes of the north-eastern shores, viz. of the 

 British islands, of Scandinavia so far as it is not included in 

 the Arctic fauna, and of the continent of Europe southwards 

 to about 40° of lat. N. — British district. 



2. The fishes of the Mediterranean shores and of the 

 adjoining shores of the Atlantic, including the Azores, 

 Madeira, and the Canary Islands — Mediterranean district. 



3. The fishes of the western shores, from 60° lat. IST. to 

 about 30 lat. W. — the North American district. 



1. The British district shows scarcely any marked dis- 

 tinctive features; the character of its fauna is simply 

 intermediate between that of the Arctic Ocean and the 

 Mediterranean district ; truly Arctic forms disappear, while 

 such as are also found ia the Mediterranean make their 

 appearance. Also with regard to the abundance of individuals 

 and variety of fishes this district forms a transition from the 

 north towards the south. 



Besides the few Arctic Chondropterygians, aU of which 

 extend iato this district, the small shore Dog-fishes are well 

 represented (Mustelus, Galeus, Scyllium, Pristiurus) ; the ubi- 

 quitous Rhina or Monk-fish is common ; of Eays, Raja pre- 

 dominates in a variety of species over Torpedo and Trygon, 

 which are still scarce. 



Of Acanthopterygians, Cerdridermichthys, Icelus, Triglops, 

 and Aspidophoroides, do not extend from the north into this 

 district ; and Cottus, Anarrhichas, Centronotus, Stichceus, the 

 Discoboli disappear Avithin its limits. Nearly all the remainder 

 are genera which are also foiind in the Mediterranean districts. 

 The foUowiug are the principal forms, and known to propagate 

 on these shores: Labrax; Serranus, Poly prion, Bentex; Mullus ; 

 Cantharus, Pagrus, Pagellus; Sebastes; Cottus, Trigla, Agonus; 

 Trachinus ; Scicena (?) ; Zeus ; Trachurus, Gapros ; Galliony- 

 mus ; Discoboli; Lophius ; Anarrhichas, Centronotus, Stick- 



