ABSTRACT
The Eastern Pacific Region spans the western coasts of North and South America, from the Aleutian Islands of Alaska south to the Wollaston Islands of Chile, and also offshore island chains such as the Galapagos, Cocos, Clipperton, Malpelo, and the Revillagigedos. Unlike the Panamic Province to the south, the molluscan faunas of the Californian Province grade directly into those of the cold water Northeastern Pacific Temperate Subregion to the north, over a broad area that extends from southern Oregon south to Point Conception. Named for San Diego, California, this northern subprovince of the Californian Province extends from Point Conception, California, south to Cabo Colonet, Baja California Norte, Mexico, and encompasses the entire area of the Southern California Bight. Extending from the southern tip of Baja California, Mexico, to Paita, Peru, and including the entire Gulf of California, Cocos Island, Clipperton Island, and the Galapagos Islands, the Eastern Pacific Tropical Subregion encompasses only a single eutropical molluscan province, the Panamic Province.
