The Lower Ordovician gastropod Ceratopea /

"Ceratopea Ulrich is redescribed from both operculum and shell.

Bibliographic Details

Main Authors:	Yochelson, Ellis L. (Ellis Leon), 1928-2006, Bridge, Josiah, 1890-1953 (Author)
Format:	Government Document Book
Language:	English
Published:	Washington : U.S. Govt. Print. Off, 1957.
Series:	Shorter contributions to general geology. Geological Survey professional paper ; 294-H.
Subjects:	Ceratopea. Paleontology > Ordovician. Paleontology > North America.