( 198 ) 

 Genus AESTRELATA Bp. 



Aestrehtti, Bonaparte, Comp. Av. II. p. 188 (1856). 



Almost cosmopolitan (pelagic). 



1. Aestrelata phaeopygia Sal v. 



OeKtrildlapJmmpi/gia, Salvin in Trans. Zool. Stic Lvml. IX. p. 507 (1876), PI. LXXXVIII. figs. 1,3; 



Wilson, -Ira Hamiiieiiscs, Part V. (1894); SaWin, dit. B. Brit. .I/u.s. XXV. p. 407 (1896). 

 ,1 psirrhild phaeopygia, Ridgway in Prac. U.S. Nat. Mus. XIX. p. 648. 



This species is oiilj- known from the Galapagos Archii)elago, bnt according to 

 Salviu the specimens described under the name of .{€■■<( rclata .fiimhricliensis from 

 the Sandwich Islands (Ridgway in Baird, Brewer, and Ridgway's Water Birds A. 

 Amer. II. p. 395 (1884) are not separable from it, while Ridgway, after first uniting 

 them, is now donbtfnl abont their identity. 



We have received Ae. phaeoptjgia from Albemarle, Wenman, and Indefatigable 

 Islands, and from between Barrington and Indefatigable Islands. It is also on 

 record from Charles Island. An adult male caught off Wenman, on August 3rd, 

 1807, hail a length of 15-50 in., an extent of 39-50 in. " The bill is black, feet light 

 bluish flesh colour, lower portion about half of webs and toes black, this colour 

 extending along tlie outer toe and one fourth of an inch up on the tarsus. Iris 

 brown." 



Genus OCEANODROMA Rchb. 



Oceiiiimiroma, Reichenbach, .S'ys/. Ar. p. 4 (1852). 



I. Oceanodroma cryptoleucura (Ridgw.). 



Ciimnchmra eri/jitoleucurri, Ridgway in Proc. U.S. iVc/. .Uiis. IV. p. 337 (188-2j. 



Ocea/mdroma cryptoleucura, Townsend in Bull Mii.i. Com/). Ziml. XXVII. p. 125 ; Wilson, Ares 



Hamiiiemes, Pt. IV. plate and text (1893); Rothschild. Arifumm of Laysnii, pt. I. p. 63 (1893); 



Salvin, Oit. B. Brit. Mm. XXV. 350. 



This petrel was for the first time described from Kauai, one of the Sandwich 

 Islands in the North Pacific Ocean, and Mr. Townsend procured it off AVenman 

 Island and off Albemarle Island. We liave no skins whatever from the Galapagos 

 group of islands. This petrel is also found in the Atlantic Ocean from .St. Helena 

 to Madeira, and on the Cape Verd Islands. A comparison of a larger material 

 from the Hawaiian, Galapagos, and Atlantic islands is desirable, as it is nuite 

 possible that some slight difl'erences between specimens from the various oceans 

 might be found. 



Genus OCEANITES Keys. & Bias. 



Oceiiiiites, Keyserling & Blasius, Wirbellh. Europ. II. p. .\ciii. (1840). 

 Seas of greater part of world. 



1. Oceanites gracilis (Elliot). 



Tlialiissidruma gracilis, Elliot iu iliii, p. 391 (l«rj9). 



Oceanites gracilis, Ridgway in Proc. I'.S. Xat. Mus. XIX. p. 658 ; Salvin, Cat. B. liril. Miis. XXV. 

 p. .361 



The greyish white edges to the greater wing-coverts, white middle of abdomen, 

 entirely difterent dimensions, and other characters, serve to distinguish this species 



