FURTHER STUDIES ON DISTRIBUTION AND TAXONOMY OF OHIO CRAYFISHES, AND THE DESCRIPTION OF

The first reference to Ohio crayfishes of which I am aware was made by Girard (1852: 88). Other references followed until by 1870 Hagen was able to include in his monograph several records from southeastern and central Ohio. About 1880 Faxon collected material from the Little Miami River during his visit to Antioch College, Yellow Springs, Ohio. Near the turn of the century, Osburn and Williamson (1898: 21) and Williamson (1899: 47-48) collected crayfishes in many Ohio localities, and in recording their collections laid the foundation of the study of Ohio crayfishes. During 1920-1921 the Ohio Survey Party collected widely in Ohio and from the collections Turner (1926) published a well annotated •list of thirteen species and subspecies. This is the most complete publication on Ohio crayfishes to date. The present paper is intended as a supplement to Turner's work. In it are described a new subspecies from Ohio, Cambarus bartoni sciotensis; a species and a subspecies are added to the state list; and the distribution of several other species more clearly defined through the addition of about fifteen hundred new records. In this paper only the counties from which Turner has not recorded a species are given. The total number of crayfishes now known to occur in Ohio is seventeen