PRESERVED_SPECIMEN; ; ; dry; HOLOTYPE. See: Johnson, Richard I. 1989. Molluscan taxa of Addison Emery Verrill and Katharine Jeannette Bush, including those introduced by Sanderson Smith and Alpheus Hyatt Verrill. Occasional Papers on Mollusks. 5 (67): 1-143, pls. 1-18.; See: Verrill, Addison E. 1884. Second catalogue of Mollusca, recently added to the fauna of the New England coast and the adjacent parts of the Atlantic, consisting mostly of deep sea species, with notes on others previously recorded. Transactions of the Conne; HOLOTYPE?. See: Verrill, Addison E. 1873. Report upon the invertebrate animals of Vineyard Sound and the adjacent waters, with an account of the physical characters of the region. Rept. U.S. Fish Comm. (1871-1872):.; Note: Verrill's description reads "Shell .... with eight or more whorls." The "or more" indicates specimen variation; this may imply more than one specimen was known [although refer to his description of T. valida with similar wording for a single specimen].; GM Image; IZ number 12848; lot count 1;