96 Mr. D. A. Bannerman on the [Ibis, 



I have already noted the brief way I intend to deal with 

 the Resident Birds. Their halntat in the Archipelago will 

 be divided under three headings : — 



Western Group, which comprises the islands of Gran 

 Canaria, Tenerife, Palma, Gomera, and Hierro. 



Eastern Group, which includes the islands of Fuerte- 

 ventura and Lanzarote ; and also the 



Outlying islets, which comprise Lobos, Graciosa, Mon- 

 tana Clara, Allegranza, Roque del Oueste, and the 

 Roque del Este. 



Thirteen islands in all, seven large and six small, including 

 the two rocks. 



Nomenclature and References. 

 In the vexed question of Nomenclature I have followed, 

 where the species occurs in both the British and Canarian 

 List, as nearly as possible'^ the names used by the Com- 

 mittee which drew up the last B. O. U. List, but I have 

 broken away from their ruling on two important points. 



1. I have used trinomials throughout the paper and have 



reduplicated the specific name in every case where 

 I know I am dealing with the typical form, except 

 where the typical species is the only race known. 



2. I have not accepted any of the "nomina conservanda" 



proposed by the Committee ; for this I have no doubt 

 I shall be severely criticised, but I am none the less 

 certain that when the next B. O. U. List appears 

 these "nomina conservanda" will have to go. 



Instead of the " N. C." retained by the Committee 

 I have used the alternative "names under the code^' 

 which they give in the second column of Appendix II. 

 on p. 355 of the List, and which conform to the rules 

 of nomenclature as drawn up by the International 

 Congress of Zoology. 

 If no doubt remains as to which species or subspecies 



* In one or two cases I have maintained subspecies which the Com- 

 mittee have not accepted, i. e. Corvus monedula spermolog^ts. 



