Early Carboniferous ophiuroids from Crawfordsville, Indiana

Molds of numerous Early Carboniferous echinoderms collected by Christian van de Loo for James Hall in 1867 from four miles south of Crawfordsville, Montgomery County, Indiana and now in the collection of the New York State Museum have been examined using latex casting techniques. Described here are the ophiuroids Vandelooaster plicatilis new genus and species, Schoenaster fimbriatus Meek and Worthen, Aganaster gregarius Meek and Worthen and Lumectaster howelli new genus and species. The types of Calyptactis confragosus Miller are redescribed for comparison. Nine crinoids, a blastoid, and an echinoid are recognized in van de Loo's collection; all have been recorded from Crawfordsville.