156 Clement L. Counts, III 



in Clay County. None of these taxa (some as subspecies) could be found 

 during my study. 



Hubricht (1976) described Mesodon panselenus from specimens 

 collected at Scotford, Clay County; Hernshaw, Kanawha County; Blair, 

 Logan County; and Iaeger, McDowell County. He reported that the 

 new species was similar to, and easily confused with, M. perigraptus, 

 but differed from it in having a more depressed shell and shorter penis. 

 My visits to the type locality and other collection localities listed by 

 Hubricht for M. panselenus failed to reveal specimens referable to this 

 species. 



Hubricht (1974) placed Mesodon burringtoni Hubricht in syno- 

 nymy with M. mitchellianus. He noted that the first specimens of M. 

 burringtoni were collected in southwest Virginia and at two localities in 

 the Kanawha-New River valleys of West Virginia. However, as more 

 material became available, especially larger shells, no apparent differen- 

 ces could be found between the two species. In the same report, 

 Hubricht noted that topotypes of Stenotrema hirsutum were indistin- 

 guishable from S. burringtoni Grimm. Such taxonomic gyrations and 

 the inability to clearly define some species in the family Polygyridae 

 may account for some of the difficulties in accurately assessing the poly- 

 gyrid fauna of West Virginia. 



Briscoe (1963) reported 8 species of Polygyridae in Jefferson County, 

 West Virginia, and reported populations of Mesodon thyroidus buccu- 

 lenta (Gould, 1848) from 11 localities within the county. However, I 

 could not locate populations of this subspecies during my study. Pilsbry 

 (1940) described the zoogeographic range of M. t. bucculenta to extend 

 from Wilmington, North Carolina south to Georgia and west to Arkan- 

 sas, Oklahoma, and Texas. He also noted that specimens referable to 

 M. t. bucculenta from Pennsylvania and other northern states are better 

 referred to M. t. thyroidus. 



Triodopsis multilineata is found only on Blennerhassett Island in 

 the Ohio River, Wood County, West Virginia (Taylor and Counts 

 1976). No specimens of this species were collected from the West Virgi- 

 nia shore of the river during my study. 



ACKNOWLEDGMENTS.— \ thank Drs. Ralph W. Taylor, Dan 

 K. Evans, and Donald C. Tarter, Marshall University, for their gui- 

 dance during the course of this study. Thanks are also due Dr. R. 

 Tucker Abbott, Delaware Museum of Natural History; Dr. Kenneth J. 

 Boss and Mr. David McHenry, Museum of Comparative Zoology, 

 Harvard University; and Mr. Leslie Hubricht, Meridian, Mississippi, for 

 their assistance in identifying snails. Further thanks are due the many 

 students and faculty members of Marshall University who generously 



