In 1948 and 1950 Dr. H. Little of the Geological Survey of Canada collected Archaeocyatha from the Lower Cambrian outcrops of Colville, Washington, and Salmo, British Columbia. These collections were later supplemented by Dr. V. J. Okulitch with fossils from the same localities. The Archaeocyatha of the Salmo area occur in a narrow band of limestone in the basal Laib formation. Those of the Colville area, Washington, were found in an outcrop of Old Dominion limestone. Numerous species are present in both localities, and two new species are described: Ethmophyllum lineatus from the Laib formation and Syringocnema colvillensis from the Old Dominion limestone. The species Archaeopharetra typica, Monocyathus sp., and Claruscyathus solidus are reported for the first time from North America. Claruscyathus solidus is particularly abundant at the Colville locality.