desarrolló en un mar tropical somero.

A single spccimen of the species Meoma ventricosa grandis CRAY, 1851, frorn the lower Pliocene-Marcos Formation beds of Carmen Island in the Gulf of California was studied. It constitutes a new fossil record of the surispecies in the early Pliocene of Me-xico, The speciíuen was found associated with calcareous algae, corals, bivalves (Pe<--ten ¿md Chione) and other echinoids. The paleontological setting for this fauna was that of a shallow and tropical sea