Scaphander willetti Dall, 1919

Remarks: Dall (1919) described Scaphander willetti based on a broken empty shell of 12 mm height from Forrester Island, Southern Alaska (Fig. 38D). This taxonomic assignment was corroborated by Valdés (2019), but in our opinion, despite the presence of a sculpture made of faint spiral lines of oval pits, the features of this shell do not entirely fit Scaphander . The sharp pyriform outline, wide anterior aperture, and flat spire and shoulder are together characters absent in Scaphander . However, we feel unable at this stage to ascribe this broken shell confidently to any known genus; therefore, until additional evidence is available, we follow the assessment by Valdés (2019).