1928-1934 collection of 86 sheets, each describing one species, num. figs & photographs, loose in printed covers. There are 20 sheets of Bivalves, 16 sheets of Prosobranch Gastropods, 49 sheets of Opisthobranch Gastropods, and 1 sheet of Cephalopoda.This is the mollusca section of a larger work describing the whole fauna of the Mediterannean Sea, but was never finished. Scarce.