262 



Mr. L. Harrison on 



Before proceeding to compare tlie classification thus 

 arrived at with any other that has been proposed, I should 

 like to lay particular stress on the fact that it has been 

 arrived at without any consideration whatever of the Petrels 

 themselves, purely from a study of one genus of parasites, 

 and that it was constructed before I had consulted any 

 ornithological classification o£ the group. 



I now give for comparison the classification of Forbes 

 (' Challenger' Reports, Zoology, iv. 1882) : — 



OCEANITIDv^. 



( Garrodia. 

 j Oceanites. 

 ' I Fregetta. 

 \ Pelagodroma. 



PROCELLARIID^. 

 Procellautin^. Diomedein^. 



p. Procellaria. 



y. Pelecanoides. 



( CEstrelata. 

 Puffinus. 

 2. { Priofinus. 



Btdweria. 



IDiomeu 

 Thalasi 

 Phcebet 



Diomedea. 



Thalassogeron, 



Phcebetria. 



e. Prion. 



' Daptioti, 

 Pagodroma. 

 Priocella. 

 ^' 1 Thalassceca. 

 Fulmarus. 

 I Ossifraga. 



The correspondence between the two schemes is certainly 

 remarkable. My evidence points to Pelagodroma belonging 

 to the Procellaria, not to the Garrodia group ; to the Fulmars 

 being nearer to the Albatrosses than to the Shearwaters ; 

 and to Ossifraga being an AJbatros rather than a Fulmar ; 

 but in all other respects the schemes coincide. 



There is not time for me to discuss my results in detail, 

 or to do much in the way of comparison with other classi- 

 ficatory schemes. But I would point out that, though my 



