398 APPENDIX. 



Genus (ESTRELATA. Type by subsequent designation o 

 Coues (Proc. Acad. Nat. Sci. Philad. 1866, p. 137) : 

 (E. liasitata (Kuhl). This genus, which was wrongly 

 spelled ^Estrelata by Bonaparte, was proposed by him 

 (Comptes Rendus, xlii. 1856, p. 768) for the Capped 

 Petrel, Procellaria hasitata Kuhl. On the same 

 page of the same journal, but a few lines previously, 

 Bonaparte introduced Pterodroma for Procellaria macro- 

 ptera of Smith. These two birds are undoubtedly 

 congeneric, and it has recently been argued that Ptero- 

 droma, which has been generally ignored, should stand. 

 The mistake has probably arisen because these names 

 have generally been quoted as first described in the 

 ' Conspectus Genera Avium,' vol. ii., and in that work 

 ^Estrelata comes first on p. 188, Pterodroma on p. 191. 

 The sheet containing these descriptions is dated 1856, 

 but there is internal evidence to show that it could 

 not have been issued till a subsequent year. The 

 names, therefore, must first have been introduced in 

 the Comptes Rendus for 1856. 



The Committee have not considered it advisable to 

 substitute Pterodroma for (Estrelata, as there is not 

 even a question of page priority. 



Genus BULWERIA. Type by monotypy : B. lulweri 

 (J. & S.). 



Bulweria bulweri. Jardine and Selby's name for this Petrel, 

 proposed in 1828, is older than that of Moquin-Tandon, 

 which dates from 1841 and is used in the 1st edition of 

 the List. 



Genus DIOMEDEA. Type by subsequent designation of 

 Gray (List Gen. Bds. 1st ed. 1840, p. 78) : D. exulans 

 Linn. 



Genus COLYMBTJS. Type by subsequent designation of 

 Gray (Cat. Gen. Subgen. Bds. 1855, p. 125) : C. arc- 

 ticus Linn. The question of the type of this Linnean 

 genus is a serious one, and has caused a considerable 



