Title from title screen (viewed September 24, 2014).
Also available online in PDF format from the U.S. Geological Survey Warehouse (http://pubs.er.usgs.gov/).
"Twelve species representing the Olenellidae, Oryctocephalidae, Ogygopsidae, Dorypygidae, Zacanthoididae, and Ptychopariidae are described and figured."
Bibliography
Includes bibliographical references (page F12) and index.