Gould A. A. (1841). Report on the Invertebrata of Massachusetts, comprising the Mollusca, Crustacea, Annelida, and Radiata. Published agreeably to an order of the legislature, by the commissioners on the Zoological and Botanical Survey of the state. pp. i-xiii [= 1-13], 1-373, pl. [1-15]. Cambridge. (Forsom, Wells & Thurston). 231-232. figure 163.
