I. Shepard Oldroyd, The marine shells of the West Coast of North America, vol. 1 (1). Stanford, California: Stanford University, 1924.

L. A.  Faustino, Summary of Philippine marine and fresh-water mollusks. Manila: Bureau of Printing, 1928, p. 384.

W. Healey Dall, Summary of the marine shellbearing mollusks of the northwest coast of America, from San Diego, California, to the Polar Sea, mostly contained in the collection of the United State National museum, with illustrations of hitherto unfigured species. Washington: Government Printing Office, 1921, p. 217.

W. Healey Dall, Summary of the marine shellbearing mollusks of the northwest coast of America, from San Diego, California, to the Polar Sea, mostly contained in the collection of the United State National museum, with illustrations of hitherto unfigured species. Washington: Government Printing Office, 1921, p. 217.

L. A.  Faustino, Summary of Philippine marine and fresh-water mollusks. Manila: Bureau of Printing, 1928, p. 384.

I. Shepard Oldroyd, The marine shells of the West Coast of North America, vol. 1 (1). Stanford, California: Stanford University, 1924.