Stimpson, W. (1851). Descriptions of two new species of shells from Massachusetts Bay, namely Spirialis gouldii, and Thracia couthouyi, and a Holothuria, under the name of Anaperus unisemita. Proceedings of the Boston Society of Natural History. 4:7-9.
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Stimpson, W.
1851
Descriptions of two new species of shells from Massachusetts Bay, namely <i>Spirialis gouldii</i>, and <i>Thracia couthouyi</i>, and a Holothuria, under the name of <i>Anaperus unisemita</i>.
Proceedings of the Boston Society of Natural History
