Perkins G.H. (1869). Molluscan fauna of New Haven. A critical review of all the marine, fresh water and land Mollusca of the region, with descriptions of many of the living animals and of new species. Part 1. Cephalopoda and Gasteropoda. Proceedings of the Boston Society of Natural History. 13: 109-136 [Errata: 428, published 1870].
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Perkins G.H.
1869
Molluscan fauna of New Haven. A critical review of all the marine, fresh water and land Mollusca of the region, with descriptions of many of the living animals and of new species. Part 1. Cephalopoda and Gasteropoda.
Proceedings of the Boston Society of Natural History