The specific name is in honor of Richard Henry Beddome.

[3] The internal shell is thinner than in Mariaella dussumieri, shelly, flat and smooth beneath, white, with close, concentric lines of growth.

[3] The body of the animal varies greatly in color from uniform ochre to deep grey-black or spotted.

It is externally similar to Mariaella dussumieri, but larger, about 4 inches (100 mm) in length when fully extended.

[3] The article incorporates public domain text from the reference.