corbula

from The Century Dictionary.

• noun Pl. corbulæ (-lē). In Hydrosoa, as in the genus Aglaophenia of the family Plumulariidæ, a common receptacle in which groups of gonangia are inclosed.
• noun [capitalized] A genus of siphonate bivalve mollusks, of the family Myidæ, or type of a family Corbulidæ, related to the common cob or clam.