462 Mr. D. A. Bannerman on the Distribution of 



General Conclusions. 



Former workers on the north Atlantic Islands have, almost 

 without exception, referred to the species under discussion 

 as Pelagodroma marina (Latham). The type locality of 

 Latham^s bird is 37° S. lat. and is accepted for the Australian 

 bird. Moquin-Tandon, in A'V'ebb and Berthelot^s ' Orn. 

 Canarxenne/ gives a full description of the bird from the 

 Canarian Seas, which he named Thalassidroma hypoleuca. It 

 differs from P. m. marina (Latham) in its uniform lighter 

 colouring on the upper parts, especially on the mantle ; but 

 particularly in the size of the bill, which is much longer. 



From the very few records from its breeding-haunts 

 available for comparison, it appears that P. m. hypoleuca 

 breeds in the northern limits of its breeding range at the 

 end of April, while in its southern limit (the Cape Verde 

 Group) it commences laying early in March. 



Range in the Azores. 



P. m. hypoleuca is evidently only a very rare straggler to 

 these islands, as we have only one authentic record of its 

 having been seen there. This is a skin in the Ponta 

 Delgada Museum which was identified by Mr. Ogil vie- Grant. 



Ravge in the Madeira Group. 



Very few records are forthcoming of this Petrel being 

 found in the Madeira Gi'oup, which, considering the near 

 proximity of the Salvage Islands, is somewhat extraordinary, 

 and only tends to show how small is the circumference of its 

 range. Padre Schmitz's notes establish this Petrel as a 

 visitor only, to Madeira itself. He records a female which, 

 on the 1 9th of February, 1908, was driven to the neighbour- 

 hood of Madeira in a sandstorm that darkened the sun ; the 

 bird fell exhausted on the deck of a steamer. Canon 

 Tristram observed the North Atlantic Frigate-Petrel near 

 Madeira, and Bolle met with it during a voyage from Lisbon 

 to Madeira. 



