A crinoid from the Pennsylvanian Essex fauna of Illinois / Lane, N. Gary. text [Chicago] : Field Museum of Natural History , 1969. eng p. 151-156 : 24 cm. "March 24, 1969." Includes bibliographical references (p. 156). Fieldiana series has been published as Geological Series by Field Columbian Museum (1895-1909) and Field Museum of Natural History (1909-1943), and as Fieldiana: Geology by Chicago Natural History Museum (1945-1966) and Field Museum of Natural History (1966-). Crinoidea, Fossil. Paleontology -- Pennsylvanian. Paleontology -- Illinois.