A class of animals of very low organisation and generally of small size, having a jellylike body, from the surface of which delicate filaments can be given off and retracted for the prehension of external objects, and having a calcareous or sandy shell, usually divided into chambers and perforated with small apertures.

Containing fossils.

Having a faculty of digging. The Fossorial Hymenoptera are a group of Wasp-like Insects, which burrow in sandy soil to make nests for their young.

( pl. Frena ): A small band or fold of skin.

( sing. Fungus ): A class of cellular plants, of which Mushrooms, Toadstools, and Moulds, are familiar examples.