Author: Henderson J.B. & Bartsch P.,
Title: A classification of the american operculate land mollusks of the family Annulariidae
Description: 1920. In 8vo, offp., pp. 32. Offprint from Proc. US. Natnl. Mus., 58 n. 2327. We add: An index to this paper compiled by H.C. Fulton in 1923

Keywords: shells snail


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