Description

 

The frog shells are rather similar to tritons (Ranellidae), but unlike the tritons they are distinguished by a deep slot for the posterior siphon (upper end, in lower picture). This feature is much like the anal notch seen in the unrelated family, Turridae, but the growth lines do not bend around its back. The shells are heavy and generally have no more than two varices per whorl. This small  family is typically found living in or under corals, in tropical and semitropical waters.

 

Classification

Class: Gastropoda

Clade: Littorinimorpha

Superfamily: Tonnoidea

Family: Bursidae

 

Major Genera

• Genus: Bursa

Bursa californica (Hinds, 1843)
California Frog Shell