PKOCELLAEIID^. 147 



Family PEOCELLAEIIDiE. 



Sub-Pamily PROCELLARIINiB. 



Genus FROCELLAEIA, Linn. 



Frocellaria pelagica, Linn. 



Procellaria pelagica, Thien. Fortpjktma. ges. Vog. tab. xcii. fig. 8 

 (1845-54) ; Baird, Brewer 8r Rtdgw. Water Birds N. Am. ii. p. 403 

 (1884) ; Seebohm, Brit. Birds, iii. p. 438, pi 56 (1886) ; id. Eggs of 

 Brit. Birds, p. 74, pi. 20. fig. 4 (1896) ; Salvin, Cat. Birds B. M. 

 XXV. p. 343 (1896) ; Sharpe, Sand-l. i. p. 120 (1899). 



Thalassidroma pelagica, Baedeker, Eier Eur. Vog. tab. 55. flg. 3 (1855-63) ; 

 Mevjitson, iEggs of Brit. Birds, ii. p. 517, pi. cxlv. fig. i (1856) ; 

 Dresser, Birds Eur. viii. p. 491 (1874). 



The eggs of the Stormy Petrel are usually truly elliptical, but in 

 some specimens one end is slightly pointed. They are without 

 gloss, white, and marked with a zone or cap of minute red dots at 

 one end. Occasionally the dots extend over the whole shell, and 

 sometimes they are entirely absent. They measure from 1 to 1*2 

 in length, and from '73 to -9 in breadth. 



Genus HALOCYPTENA, Coues. 



Halocyptena microsoma, Coues. 

 (Plate XI. fig. I.) 



Halocyptena microsoma, Baird, Brewer S/- Bidgio. Water Birds iV. Am. 

 ii. p. 402 (1884); Salvin, Cat. Birds B. M. xxv. p. 346 (1896); 

 Sharpe, Hand-l. i. p. 121 (1899). 



The eggs of the Wedge-tailed Petrel in the Collection are of an 

 «lliptical or broad oval shape, white, with a very few minute rufous 



l2 



