Type material for 126 nominal species of fossil echinoderms are in the Invertebrate Paleontology Collections of Yale University's Peabody Museum of Natural History. Primary types for 38 nominal species include 25 holotypes, 31 syntypes (representing 12 nominal species) and 1 neotype. Secondary types for 3 nominal species include 5 paratypes. Tertiary types of 76 nominal species include 403 hypotypes. Most types are from Crawfordsville (Indiana), New York State and Tennessee and have been described by W.B. Clark, R.T. Jackson, N.G. Lane, R.C. Moore, C. Schuchert, F.Springer and J.F. Van Sant.