Dentalium, as seen in longitudinal section (except the foot): S, shell, Mt, mantle; Sa, shell muscle; Mh, mantle-cavity; F, foot, Mk, cephalic prominence or oral cone; T, capfacula; R, radula; D, intestine; l, liver, Af, anus; G, cerebral ganglion; N, kid

Freshwater and Marine Image Bank, University of Washington Libraries Digital Collections