Muskrat Body Mass Trend 43 



go to Robert A. Martin who kindly provided us with his unpublished 

 manuscript, and whose critical review of this work greatly improved 

 its relevance. We also wish to express our appreciation to Mike Trinkley 

 and Debi Hacker of the Chicora Foundation, Columbia, South Carolina, 

 and to David Wethey, Sara Woodin, and Wallace Dawson for their 

 input on this manuscript. Finally, thanks go to Overton Ganong, Director 

 of the South Carolina State Museum, for other courtesies. 



LITERATURE CITED 



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 the Ardis local fauna (late Pleistocene), Harleyville, South Caro- 

 lina. Brimleyana 21:1-35. 



Boyce, S. Mark. 1978. Climatic variability and body size variation 

 in the muskrat (Ondatra zibethicus) of North America. Oecologia 

 (Bed.) 36:1-19. 



Dunbar, J., D. Webb, D. Crane. 1989. Culturally and naturally modified 

 bones from a paleoindian site in the Aucilla River, northern Florida. 

 Pages 473-497 in Bone modification. (R. Bonnichsen and M. Sorg, 

 editors). Center for the Study of the First Americans. Oregon 

 State University, Corvallis. 



Lawrence, B. 1942. The muskrat in Florida. Proceedings of the New 

 England Zoological Club 19:17-20. 



Martin, R. A. 1993. Patterns of variation and speciation in Quater- 

 nary Rodents. Pages 1-16 in Morphological change in Quarternary 

 mammals of North America. (R. A. Martin and A. D. Barnosky, 

 editors). Cambridge University Press, Cambridge, England. 



Received 8 March 1994 

 Accepted 30 August 1994 



