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Sampson, F. A. ... Notes on the distribution of shells. Kansas City 



Review of Science and Industry. III. The 

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Sampson, F. A. ... Shells of Pettis County, Mo. Bulletin, Sedalia 



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Sampson, F. A. ...Shells within city limits. Nautilus. IV. p. 82. 



1890. 



Sampson, F. A. ... Mesodon andrewsi in Missouri. Nautilus. VI. p. 



90. 1892. 



Sampson, F. A. ... Southern shells in Missouri. Nautilus. VIII. p. 



18. 1894. 



Sampson, F. A. ... Polyg^jra albolabris alleni and other Missouri 



Helices. Nautilus. XXV. p. 130. 1912. 



Sampson, F. A. ... Shells of southeast Missouri. Nautilus. XXVI. 



p. 90. 1912. 



Shimek, B Loess papers. Bulletin, Laboratory of Natural 



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Shimek, B Helicina occulta Say. Proceedings, Davenport 



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Shimek, B Additional note on Helicina occulta. Journal- of 



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Springer Physa rhomboidca Crandall. Proceedings, Acad- 

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Stearns, R. E. C. ...Notes on recent collections of North American 



mollusks. Proceedings, U. S. National Mu- 

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Stearns, R. E. C. ...Same noticed in Nautilus. VII. p. 132. 1894. 



Vanatta, E. G Notes on the smaller American Planorbes. Nau- 

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Vanatta, E. G., and 



Pilsbry, H. A. ... On Biflddria pentodon and its allies. Nautilus. 

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Walker, Bryant . . . Notes on Planorbis II. P. bicarinatus. Nautilus. 



XXIII. p. 21. 



Wetherby, A. G. ... Some notes on American land shells. I. Cincin- 

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Issued July 18, 1913. 



