Notes On Urosalpinx cinerea (Say, 1822) Atlantic Oyster Drill

    Although Thomas Say (1822: 236) failed to mention banding on the shells of his new species, Fusus cinereus, his later treatment, and only figures (Say, 1831: plate 29; unpaginated plate explanation), indicate two faint narrow dark spiral bands on the body whorl.

Binney, W.G., 1858. The complete writings of Thomas Say on the conchology of the United States. Pp 1-252 + vi + pls. i-lxxv.
Say, T., 1822. An account of some of the marine shells of the United States [part 1 of 3]. Journal of the Academy of Natural Sciences of Philadelphia 2: 221-248. "June" [July].
Say, T., 1831. American Conchology, or descriptions of the shells of North America. Illustrated by colored figures from original drawings executed from nature 3. Thomas Say, New Harmony, Indiana. [40 pp., unpaginated] + pls. 21-30. [Stated date: Sept., 1830; true date: Sept., 1831.]