Heilprin, A. (1881b) On some new species of Eocene Mollusca from Clarke Co., Ala., with some points as to the stratigraphic positions of the beds containing them. Proceedings of the Academy of Natural Sciences of Philadelphia, 32, 364–375, pl. 20.
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Heilprin, A.
1881
On some new species of Eocene Mollusca from Clarke Co., Ala., with some points as to the stratigraphic positions of the beds containing them
Proceedings of the Academy of Natural Sciences of Philadelphia