Descriptions of new Crinoidea, &c., from the Carboniferous rocks of Illinois and some of the adjoining statesv. 17No. 3Academy of Natural Sciences155–166
Meek, F. B. and Worthen, A. H. 1865. "Descriptions of new Crinoidea, &c., from the Carboniferous rocks of Illinois and some of the adjoining states." Proceedings of the Academy of Natural Sciences of Philadelphia, 17, (3) 155–166.