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Racovitza, E. G. 1920. VII. Notes sur les isopodes. 6, Asellus 



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Rafinesque, C. S. 1820. Annual synopsis of new genera and species of 



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Richardson, H. 1900. Synopses of North American invertebrates. VIII. The 

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Say, T. 1818. An account of the Crustacea of the United States. Journal 

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Seidenberg, A. J. 1969. Studies on the biology of four species of fresh- 

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Styron, C. E. 1968. Ecology of two populations of an aquatic isopod, 

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Walker, B. A. 1961. Studies on Doe Run, Meade County, Kentucky, IV. A 

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44 



