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'78. On Unio subrostratus Say. Proc. Acad. Nat. Sci. Phila., 

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'87 -'88. Brief Notes on the Land and Fresh-water Shells of 

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 '89. Brief Notes on the Land and Fresh-water Shells of Mer- 

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'06. A New Subspecies of Polygyra multilineata Say. Nautilus, 

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'86. Notes on some Eastern Iowa Snails. Am. Nat., Vol. XX., 



p. 75. 

 '89. Nomenclature and Check-list of North American Land 



Shells. Proc. Acad. Nat. Sci. Phila., 1889, p. 191. 

 '90. A New Species of Fresh-water Mollusk. Review of paper 



by B. Shimek. Nautilus, Vol. IV., p. 48. 

 '90a. Preliminary Notices of New Amnicolida-. Nautilus, Vol. 



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 '95. Notes on American Forms [of (Tuudlachia] . Nautilus, 



Vol. IX., p. 68. 

 '96. New American Ancylida-. Nautilus, Vol. IX., p. 137. 

 '97. A Classified Catalogue of American Land Shells, with 



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 '98. Notes on New and Little-known Amnicolid.e. Nautilus, 



Vol. XII., p. 42. 

 '99. New American Land Shells. Nautilus, Vol. XII., p. 101. 

 '06. ^'itrea rhoadsi and Succinea retusa nuigister. Nautilus, 



Vol. XIX., p. 109. 

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'00. A Partial Revision of the Pupa- of the United States. 



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