AVES PUFFINID^. 1 57 



Genus PRION Lacepfede. 



Type. 



Prion, Lacep^de, Mem. I'lnst. III. p. 513 (1801); Bp. Consp. 



Av. II. p. 192 (1856); Coues, Proc. Acad. Sci. Philad. 



1866, p. 167; Forbes, Voy. "Chall," Zool. IV. pt. XI. 



p. 42 (1882); Salvin, Cat. Bds. Brit. Mus. XXV. p. 432 



(1896); Sharpe, Hand-List Bds. I. p. 128 (1899) . . P. vittatus. 



PacJiyptila, Illig. Prodr. p. 274 (181 1) P. vittatus. 



Prianiphus, Rafinesque, Anal. p. 72 (1815), fide Bp. 



Pseudoprion, Coues, Proc. Ac. Sci. Philad. 1866, p. 164 . .P. desolatits. 



Geographical Range. — Southern Oceans. 



Prion vittatus (Gmelin). 



Broad-billed Petrel, Lath. Gen. Syn. III. pt. 2, p. 432 (1785). 



Procellaria vittata Gm. Syst. Nat. I. p. 560 (1788). 



Prion vittatus Darwin, Voy. Beagle, Birds, p. 141 (1841 : Landfall Island, 



west coast of Tierra del Fuego, breeds) ; Burm. An. Mus. Nac. 



Buenos Aires, III. part X. p. 248 (1888: S. Patagonia); Salvin, 



Cat. B. Brit. Mus. XXV. p. 432 (1896); Sharpe, Hand-List Bds. I. 



p. 128 (1899) ; Carbajal, La Patagonia, Part II. p. 277 (1900) ; Oates, 



Cat. Bds. Eggs, Brit. Mus. I. p. 160 (1901). 



General description. 



Size. Adult Male. — Total length, about 12 inches. 



Wing: 7.6 inches. 



Tail : Central rectrices, 3.8 inches ; lateral rectrices, 3.5 inches. 



Bill, 1.5 inch. 



Tarsus, 1.3 inch. 



Color. Adult Male. — General color above, light greyish or plumbeous 

 blue. Lower parts in general white, with suffusion of greyish blue on 

 the sides of breast and flanks and mottling of the same color but a darker 

 shade, on the under tail coverts. 



Head : Top of the head and sides of the face plumbeous blue. A 

 white superciliary stripe. The region about the eye and below it darker 

 in color, almost dusky. 



