Extensive collections of Pennsylvanian marine gastropods from 20 marine units in the Appalachian Basin contain 227 recognizable taxa. Twenty-two new species and subspecies are recognized including Bellerophon (Bellerophon) laticallis, B. (B.) graphicus varicallis, B. (Pharkidonotus) breyeri, Knightites (Cymatospira) montfortianus discordis, K. (Retispira) fascireticulatus, Colpites lirata, Abylea formosa, A. paradoxus, A insolitus, Spiroscala decorata, Euconospira equisita, Neilsonia invisitata, Worthenia parvula, Gosseletina nodosa, Glyptotomaria (Dictyotomaria) concinna, G. (D.) facta, G. (D.) decora, Phymatopleura preclara, Callispira grossa, Ceraunocochlis? subulata, Streptacis? ingens, and S.? complanata.
Correlation of marine stratigraphic units within the collection area are discussed. Zonation on the basis of pseudozygopleurid taxa, following that of Anderson et al. (1989), is presented as well as mention of characteristic taxa of the various series.