1920.] Birds of the Canary Islands. 557 



Puffinus k. fortunatus is a race of P. kuhli, geographical 

 forms of which range from the Mediterranean to the 

 Cape Seas. 



More interesting are the affinities of the other Shearwater 

 and Petrel. P. a. haroli is represented by allied forms in 

 several widely separated localities in the Pacific and Indian 

 Oceans^ but is the only form known to occur in the Atlantic, 

 where it is isolated in tlie Archipelagos from the Azores 

 to the Canaries. 



Buhveria buhveri hu/weri enjoys the same distribution in 

 the Atlantic as the Madeiran Allied Shearwater. In the 

 Pacific the allied races known are confined to the Hawaiian 

 and Bonin Islands — another interesting case of discontinuous 

 distribution. 



These last two cases have been more fully discussed on 

 pp. 543-544. 



The 15 Winter Visitors without exception are all north 

 European species — many having a wide range — especially 

 the Ducks, the Waders^ and the Coots. 



The 33 Birds of Passage are likewise chiefly north 

 European, but Merops apiaster and Falco eleonone belong 

 more to the Mediterranean fauna. Of the Waders all are 

 species with an extensive range which visit the Canaries on 

 migration to and from their breeding-quarters in the far 

 north of Europe and Asia. 



The 5 Annual Visitors are all members of the Order 

 Tubinares, with extensive distribution in the Atlantic and 

 Pacific. 



Amongst the 30 Occasional Visitors we find several south 

 European and Mediterranean species, as, for instance, the 

 Golden Oriole, Rock-Martin, Lesser Cuckoo, Roller. White 

 Stork, and Marbled Duck ; the remainder are north Euro- 

 pean birds, the Waders breeding also in northern Asia. 



We have now only to consider the Rare Visitors, and 

 here it will be noticed that the south European forms 

 increase in number and African species occur — a state of 

 tilings which we can easily understand. 



