Early twentieth century records of marine decapod crustaceans from Los Angeles and Orange counties, California by Mary K. Wicksten. Bull. Southern California Acad. Sci., 83(1): 12-42, 1984. During 1900-1930, 100 species of decapod crustaceans were collected along the coasts of Orange and Los Angeles counties, California. Records from the published literature, the files of the Allan Hancock Foundation, and the collections of the U.S. National Museum are presented. Checklists for major areas of collecting are provided. Thirty-four other species, not reported during 1900-1930, are listed.