PROCELLAUITD.'E - THE TETKELS — UCEANODUUMA. 



413 



Two spi'ciiis III' tliis j,'L'niis are known, distiugiiislied by the followinj,' cliarai'ter.s : — 



1. O. furoata. Bluish asliy, the oibiliil le'^ioii and wiiiys (excejit greater coverts) dusky. 



;/(//(. North I'aeilic. 



2. O. Hornbyi. Forehead, cheeks, nuchul collar, and lower parts white ; tiuills black ; rest 



of pluniayu dark gray, including a jugular band. Hub. North I'acilic. 



Oceanodroma fiircata. 



THE FORK-TAILED PETBEL. 



Vritrclhiriafurcalii, Omf.l. S. N. I. ii. 1788, 561. 



I'/ia/iiniidmrna fumtfti, GovLV, Voy. Sulphur, Birds, 1844,50, \i\. ;?3. — Ca.ssin, lilustr. I!, t'ul. 



Ti'x. etc. 185.'), 274, pi. 47. — Lawi;. in Ikird's B. X. Am. ]8.".8, 8-J!t. — liAiiio, Cat. N. Am. 



B. 18,')i), no. 640. 

 Oceanodroma faraila, Bonai'. Coiisp. II. IS.'iO, li»4. — t'(Uir,s, Pr. Ac. Nat. Sci. Philud. 1SU4, 74 • 



Key, 1872, 329 ; (heck List, 1873, no. 591 ; ed. 2, 1882, no. 820. — Itioiiw. Num. N. Am. B.' 



1881, no. 720. 

 I'ron 1/(1 fill, oriciUalin, Pali.as, Zoog. liosso-As. II. 1826, 315. 

 " Tluilassidronia cinnva, (!oui,l)." (I5oxai'. ) 

 Thilamdronm jilumbfu, Pkalk, Zoul. K.xpl. Exp. Birds, 1848, 292. 



Haij. Noi'th Pucilic Ocean, south to coast of Oregon. 



Si'. Chaii. Aihdt : Vhw. light cinereous, fading gradually to white on the chin and throat, 

 anal region, and crissuni ; orbital region, longer scaimlars, inner wing-coverts, anterior and outer 

 lesser coverts, ululiL-, prinniry covert.s, and reniiges grayish dusky ; central lesser, middle, and 

 inner greater coverts, and tertials broadly edged with ashy white. Lining of the wing clouded 



. ^^iS5aeri^^^in ^>»^ 



witli grayish dusky and ashy white, the Ibrnier predominating. Bill wlioUy deep black ; iris 

 d.irk brown ; legs and feet dusky brown. Yoinxjir: Similar, but enlurs much more dingy, with 

 little if any of a bluish cast. 



Length, about 8.50 to 9.(K) inches; extent, 18.2.') to lO.OO; wing, .').9.'i-r..4() ; tail, ;3.7r)-4.()(>, 

 f.iikcil for about 1.0(); culmen, .M-.CiO ; tarsus, 1.00-1.10 ; middle toe .!)()-!)."). 



This .species appears to bo less of a wanderer than are most of its family, and to be 

 cxelusively an inhabitant of the Northern PaeiHe C)cean. It is an interesting addi- 

 tion to the fauna of the United States made by the naturalists in the Wilkes lOxplor- 

 iiig Expedition — having been previously known only as a bird of the Asiatic coast, 

 of the islands of the North l*aeili(!, and of Russian America. It was found iu largi' 

 munbers by this Expedition on the southern coast of Oregon. 



This bird was first noticed by I'ennant in his " Ar(!tic Zoology," and called by him 

 the "Fork-tailed Petnd." The oidy account given of it was, that it had been taken 

 iiiiioiig the ice between Asia and America. Subsecpiently Pallas referred to it as an 

 iisluihitant of the coasts of Unalaslika and the Kurile Islands. 



We next iind it mentioned in the Zoology of the Voytigt! of the " Sidphur," 1844, 



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