ORNITHOLOGICAL EXi LORATIONS fj 1 



I also saw it in Kamtscbatlia, on the Bay of Avatscba, and suspect 

 that it is a young bird of this species which has been reported by Mr. Ta- 

 czanowski under the name of nigripes AuD. as having been taken in 

 Kamtschatka. 



Family PKOCELLAEID^. 



28. Fulmarus glacialis glupischa Stejneger. 



1769. — ProceUaria glacialis Pall., Spicil. Zool., V. p. 28. — Id., Zoogr. Eoss. As., II, p 

 312 {nee Lin.) (182G).— Schrexck, Keis. Amurl., I, p. 517 (I860).— Taczajs^, 

 Bull. Soc. Zool. France, 1877, p. 40.— Id., Ora. Faim. Vost. Sibir., p. 65 

 (1^77).— Fulmarus g. Blakist. «&. Pryer, Ibis, 1878, p. 218.— Seeb., Ibis, 

 1879, p. 25. 



1838. — Procdlaria pacifica AyDUB., Orn. Biogr. V (p. 331) {nee Gmel., 1788). — TaCZAn., 

 Bull. Soc. Zool. France, 1882, p. 398. — Fulmarusp. Cassin, Pr. Philada. Acad., 

 1862, p. 327.— Blakist. & Pryer, Tr. As. Soc. Jap., VIII, 1880, p. 190.— 

 lid., ibid., X, 1882, p. 106.— Blakist., Amend. List B. Jap., p. 21 (1884). 



1883. — PHoccUa tenuirostris 'Nelson, Cruise Corwin, p. 112 {part. necAvD. ; cfr. Stejn- 

 eger, Auk, 1884, p. 233). 



18Si.— Fulmarus glacialis glupisclia Stejneger, Auk, 1884, p. 234. — Turner, Auk, 1885, 

 p. 158. 



An examination of thirty-six specimens of arctogsean Fulmars has 

 given the following results : 



(1.) Both in the Atlantic and in the Pacific two very easily distinguish- 

 able forms occur, one almost uniform darlc ashy or nearly sooty, the other 

 white with pearl-blue mantle. The former is not to be confounded with 

 the young bird of the latter, as enormous breeding colonies of the sooty 

 form exclusively are met with. The young birds of the white forms 

 have the head and the greater part of the lower surface suffused with 

 light gray, yet they can never be mistaken for the dark oues, and I 

 doubt very much if any intergradatiou between the fully matured adults of 

 the two forms or phases can be proven. I have observed thousands and 

 tens of thousands of the dark form breeding, not finding a single one per- 

 ceptibly lighter, although a small colony of the white form was breed- 

 ing in the neighborhood, but separate from the dark ones; nor were any 

 of the light phase perceptibly darker than usual ; and in no case were 

 white and dark birds paired together. 



(?.) The Atlantic and Pacific birds show hardly any — even an aver- 

 age — difference in the shape of the bill, the form of the nasal tubes, «&c., 

 upon which to base a separation of them, but there seems to be a decided 

 difference in the coloration of that member. In all the birds, dark and 

 light ones, from the Pacific the bill is light-colored, only with a little 

 duskvon the borders of the different lamellse and on the culmen between 



