Remarks on some types of Carboniferous crinoidea, with descriptions of new genera and species of the same, and of one echinoidv. 20Academy of Natural Sciences335–359
Meek, F. B. and Worthen, A. H. 1868. "Remarks on some types of Carboniferous crinoidea, with descriptions of new genera and species of the same, and of one echinoid." Proceedings of the Academy of Natural Sciences of Philadelphia, 20 335–359.