Couthouy, J.P. 1838. Descriptions of new species of Mollusca and shells, and remarks on several Polypii, found in Massachussets Bay. Boston Journal of Natural History 2(1): 53-111. Available electronically.
Couthouy, 1838. Boston Journ. of Nat. Hist. 2(1): 62, pl. 3, fig. 7.