basis of recordCarpenter, P. P. (1857). Report on the present state of our knowledge with regard to the Mollusca of the West Coast of North America. <em>Report of the British Association for the Advancement of Science.</em> 1856: 159-368., available online athttp://biodiversitylibrary.org/page/12920056 page(s): 195, 211, 302 [details]