PROCELLARIID/E. 271 



The Black Petrel is only known from the type in the Paris 

 Museum, which was collected by Mons. Delattre during his voyage 

 from Nicaragua to California ; and an example in the collection of 

 Canon Tristram, which was obtained twenty years afterwards by 

 Lieut. Gunn during July in Sendai Bay on the east coast of Hondo. 



I have carefully compared the two examples and have no doubt 

 that they belong to the same species. 



267. PROCELLARIA FURCATA. 

 (GREY FORK-TAILED PETREL.) 



Trocdlaria furcata, Gmelin, Syst. Nat. i. p. 5G1 (1788). 



The Grey Fork-tailed Petrel is slightly larger than Leach's Petrel 

 (wing from carpal joint about 6^ inches). It is pale slate-grey, 

 shading into white on the under tail-coverts and the tips of the 

 scapulars and tertials, and into dark brown on the axillaries, under 

 wing-coverts, lesser wing-coverts, and ear-coverts. 



I'igures : Cassin, Birds of California &c. pi. 47; Baird, Brewer, 

 and Ridgway, Water-Birds N. Amer. ii. p. 413 (woodcut of head, 

 foot, and tail). 



Head of Procellaria furcata. Natural size. 



The Grey Fork-tailed Petrel was recorded from the Kurile Islands 

 from examples obtained by Mons. Merck (Pallas, Zoogr. Rosso- Asiat. 

 ii. p. 315) ; and it has recently been found breeding on Rashua, one 

 of the central islands of the chain, by Mr. Snow (Blakiston and 

 Pryer, Ibis, 1878, p. 218). There are three examples in the Pryer 

 collection obtained by Mr. Snow from this locality in June (Scebohm, 

 Ibis, 1884, p. 33). 



