[1] They are pyriform, quite thick and heavy, almost swollen, with slightly square contours.

In the living cowries mantle and foot are well developed, with external antennae.

mus tristensis: "Off Tucacas, Golfo de Triste, Venezuela.

"[2] These cowries live in the Southern Caribbean Sea, along northern Colombia and western Venezuela.

Muracypraea mus lives in tropical shallow water, generally in the low intertidal zone on seagrass beds, but also at greater depths, usually feeding on algae and sponges (omnivore-grazer).