BRACHYRAMPHTJS HYPOLEUCUS. 
CAPE ST. LUCAS GUILLEMOT. 
BACHYRAMPHUS HYPOLEUCUS. Xantus. Proc. Acad. Nat Scien (1859), p. 299. 
Among the new and curious forms obtained by Mr. John Xantus during the period in which he was collecting obiects of Natural History at 
Cape St. Lucas, not one was more unexpected and seemingly out of place, than the present species. Inhabitants of high northern latitudes coming 
south only during severe winters, the family of Auks were always associated with ice and snow, and the chilling blasts of winter, therefore it 
appeared almost unnatural that one of these strange birds should be found domiciled at so southern a point. 
The present species resembles more the B. Marmoratus, than any other member of the family inhabiting our coast, in its slender bill and small 
size. Only one specimen was obtained by Mr. Xantus, and as this seems to be in its winter dress, we cannot form any idea of what it looks like 
when arrayed in the nuptial plumage. Nothing of its habits or economy are known. 
Head and upper parts brownish black; sides of neck and breast ashy. Rest of plumage pure white. Bill black. The figures are the natural 
size. 
