vii, 218 pages : illustrations ; 30 cm + and atlas of vi preliminary leaves, 2 maps. 65 x 45 cm
General Note:
At head of title: Department of the interior. U.S. Geological and geographical survey of the territories. Second division. J.W. Powell, geologist in charge. "Invertebrate paleontology of the Plateau province, together with notice of a few species from ... Colorado, by Charles A. White." p. vii, [74]-135.