- The mud snails, or basket shells, are shallow water, usually intertidal, mud dwellers.
They occur in large colonies, and are scavengers. A few of the several hundred species
live in deep water. The operculum is chitinous (Abbott & Dance, 2000). The shells
shown at the right were collected at Port Alfred, South Africa, in the early 1960's.
- The genus Nassa Lamarck is a synonym of Nassarius.
- Class: Gastropoda
- Clade: Neogastropoda
- Subfamily: Buccinoidea
- Family: Nassariidae
- Major Genera
- Genus: Bullia
- Genus: Cyllene
- Genus: Demoulia
- Genus: Ilyanassa
- Genus: Nassarius
Bullia annulata (Lamarck, 1816)