New echinoids from the Ripley group of Mississippi
By: by Arthur Ware Slocom -- ; Oliver Cummings Farrington --
Contributors: Farrington, Oliver C. 1864-1933, [editor]; Field Museum of Natural History.
Series: Fieldiana -- v. 4, no. 1; Field Museum of Natural History. Publication -- 134. -- Geological series -- Vol. IV, no. 1; Publication (Field Museum of Natural History : 1909) -- 134; Publication (Field Museum of Natural History : 1909) -- v. 4, no. 1
Publisher: Field Museum of Natural History
Published: 1909
Place of publication: Chicago
Subjects: Sea urchins, Fossil