1896.] NATURAL SCIENCES OF PHILADELPHIA. 487 



CONTRIBUTIONS TO THE ZOOLOGY OF TENNESSEE. 

 No. 4, MOLLUSKS. 



BY HENRY A. PILSBRY AND SAMUEL N. RHOADS.^ 



The following paper concludes the annotated lists of the animals 

 of Tennessee, collected and observed by Mr. Rhoads, which have 

 appeared in the Proceedings of the Academy of Natural Sciences of 

 Philadelphia, beginning with page 376, in the volume for 1895. 

 The reader is referred to this article for an itinerary of the journey 

 through Tennessee, during which the collection of mollusks here 

 enumerated was secured. 



The list is restricted exclusively to the collection made by Mr. 

 Rhoads in May and June, 1895, no attempt being made, as in pre- 

 vious papers of this series, to complete the list. 



The literature of Tennessee mollusks is extensive, nearly all gen- 

 eral works on the North American land and fresh water forms con- 

 taining descriptions of or references to species from the state. 

 There are, however, but few special papers on shells of this area. 

 Dr. James Lewis published in the American Journal of Conchol- 

 ogy, VI, 1870, p. 188-191, " Notes on the Land Shells of East Ten- 

 nessee," based on specimens collected by Miss Annie E. Law. 

 Pases 216-226 contain an article " On the Shells of the Holston 

 River," by the same author, likewise from Miss Law's collection. 

 Tryon, in Amer. Jour. Conch., VII, p. 86, reviews Dr. Lewis' notes 

 on Holston River Strepomatid(e. A third paper by Lewis, " Shells 

 of Tennessee (No. 2)," collected by Miss Law, appears in Proceed- 

 ings of the Academy of Natural Sciences of Philadelphia for 1872, 

 pp. 108-115. A number of other papers by Dr. Lewis, in the same 

 Proceedings, and by Prof. A. G. Wetherby, in the Journal of the 

 Cincinnati Society of Natural History, deal mainly with Tennessee 

 mollusks. 



In species of Unionidce, Tennessee is wonderfully rich. The 

 western part of the state, represented in the collection here recorded 



^ Prof. H. A. Pilsbry, of the Academy of Natural Sciences of Philadelphia, 

 and his assistant, Mr. E. G. Vanatta, identified the entire collection. Chas. 

 T. Simpson, of the National Museum, has kindly examined and reported on a 



number of ambiguous and difficult Unionidse. All annotations are made by 



Mr. Pilsbry. 



