The Prehistory of Baja California: Advances in the Archaeology of the Forgotten Peninsula Don Laylander and Jerry D. Moore (eds.) Gainesville: University Press of Florida, 2006 254 pp., maps, illustrations, tables, bibliography, index; $55.00, (cloth). ISBN: 0-8130-2939-2

This report documents the recovery of modified remains of two extinct marine pelecypod mollusks, Rangia lecontei and Ostrea vespertina, from an archaeological deposit at Barrel Springs (CA-SDi-4443) in eastern San Diego County. O. vespertina has not been reported previously in an archaeological context. Smith (in Alvarez de Williams 1975) briefly noted the occurrence of R. lecontei in an archaeological context in the Lake Cahuilla (Salton) Basin.'

A newly described specimen of chancelloriid represents the first occurrence of Allonnia in the middle Cambrian Wheeler Formation of Utah. This occurrence fills a geographic gap in the genus’s distribution from the Burgess Shale Formation (British Columbia) to the El Gavilán Formation (Sonora). It is also the geologically youngest occurrence of the genus in North America.