DescriptionSchematic mollusc by B and P.jpg English: "Ancestral mollusc", 1935. an. anus; au. auricle; ce.g. cerebral ganglion; ct. ctenidium dig.gl. digestive...
DescriptionSchematic mollusc.jpg English: From The sea-beach at ebb-tide : a guide to the study of the seaweeds and the lower animal life found between...
