Abstract:
The fourth of a six-part monograph on the Permian brachiopods from several mountain ranges in western Texas, especially the Glass Mountains of Brewster County, this volume contains descriptions of genera and species in the orders Rhynchonellida and Spiriferida. The Rhynchonellida contain 30 genera in the superfamily Rhynchonellacea and 3 genera in the superfamily Stenoscismatacea. The Spiriferida contain 2 genera of Cyrtiacea, 4 of Athyridacea, 9 of Spiriferacea, and 6 of Reticulariacea.
