Cephalic shield short, truncated posteriorly; eyes deeply embedded; three calcareous stomachal plates; shell external, with reduced spire.

The thin extremity then acquires a mouth, and may be recognised as a stomachal peduncle, which is employed, as above indicated, in obtaining nourishment.

Stomachal grievances were forgotten, and few ventured to desert the imaginary security of their homes to face the risks the redress of grievances would entail.