. The Auk. Birds. "Vol. XXXI"! Nichols, Oceanodroma castro. do9 1914 J one a heavier bill with stronger hook. The followmg table shows the tail differences; the bill differences are perhaps better shown by the figures. Whereas Atlantic and Pacific birds have little chance to inter- breed, the differences are so slight that, intermediates would be expected and the relationship is best expressed by considering them subspecifically distinct. Oceanodroma castro bangsi ssp. nov. Type. No. 12413. Collection of E. A. and O. Bangs. 9 . Collected 1° N. 93° W., February 6, 1901, by R. H. Beck.
. The Auk. Birds. "Vol. XXXI"! Nichols, Oceanodroma castro. do9 1914 J one a heavier bill with stronger hook. The followmg table shows the tail differences; the bill differences are perhaps better shown by the figures. Whereas Atlantic and Pacific birds have little chance to inter- breed, the differences are so slight that, intermediates would be expected and the relationship is best expressed by considering them subspecifically distinct. Oceanodroma castro bangsi ssp. nov. Type. No. 12413. Collection of E. A. and O. Bangs. 9 . Collected 1° N. 93° W., February 6, 1901, by R. H. Beck. Bill heavier and more strongly hooked than usual in the genus. Sooty black, wing coverts sUghtly browner. Bases of tail feathers, except middle pair 'broadly white, the shafts of the feathers pale. Upper tail coverts are klmost all lacking in the type specimen, two or three remaining ones white to the end. Probably the coverts were much as usual in the species, and the remaining feathers very likely have had black tips worn off. Bill and feet black. Length (skin) in.; wing ; tail ; bill ; tarsus .95; middle toe and claw The only other specimen at hand, from Cocos Island, has wings moulting and not comparable. The tail and its coverts are also in. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original American Ornithologists' Union. Washington, D. C. : American Ornithologists' Union, etc.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbirds, bookyear1884
