100 U.S. NATIONAL MUSEUM BULLETIN 221 



Genus BRACHYRAMPHUS M. Brandt 



Brachyrhaniphus hypoleucus Xantus 



Proc. Acad. Nat. Sci. Philadelphia 11:299 (not earlier than Novem- 

 ber 29) , 1859. 

 =Brachyramphus hypoleucus Xantus. See Peters, Checklist of birds of 



the world 2:355, 1934. 

 13046. Adult female. Cape San Lucas, State of Baja California, Mexico. 

 July 14, 1859. Collected by John Xantus. Original number 1310. 



Genus AETHIA Merrem 



Siniorhynchus Cassini Coues 



Proc. Acad. Nat. Sci. Philadelphia 20: 45 (not earlier than January 

 21), 1868. 

 =Aethia pygniaea (Gmelin). See Ridgway, Birds of North and Middle 

 America 8:771,773, 1919; Peters, Checklist of birds of the world 

 2:357,358, 1934. 

 46564. Immature male. Unimak Pass (the strait between Unimak Island 

 and Akun Island), Aleutian Islands, Alaska. August 3, 1866. Col- 

 lected by William H. Dall. Original number 310. 



Genus CERORHINCA Bonaparte 



Cerorhina suckleyi Cassin 



in Baird, Cassin, and Lawrence, Rep. Expl. and Surv. R.R. Pac. 9: liv, 



906, 1858. 

 =Cerorhinca monocerata (Pallas). See Ridgway, Birds of North and 



Middle America 8: 779, 782, 1919. 

 4579 6i5 (not 4579). Adult (sex not indicated) without knob on bill. 



Fort Steilacoom, Pierce County, Washington. February (not January) 



8, 1856. Collected by George Suckley. Original number 221. 



Genus FRATERCULA Brisson 



Fratercvila arctica naumanni Norton 



Proc. Portland Soc. Nat. Hist. 2: 144 (footnote 17), May 20, 1901. 

 86019. Adult (sex not indicated). Hakluyt Headland, northwestern ex- 

 tremity of West Spitsbergen Island, Arctica. August 9, 1881. Collected 

 by M. K. Schwenk. 

 For a discussion of this specimen's claim to typeship, see Norton, Auk 

 34: 205-206, 1917. 



