Language: Bilingual in English and Portuguese
Contents include: History of the shell (The shell before man, The shell and man); Study of the mollusc (Brief reference to their specialists, Etymology, Symbols, abbreviations and adapted systematics); Classes (Caudofoveata, Monoplacophora, Solenogastres, Polyplacophora, Gastropoda, Bivalvia, Scaophopoda, Cephalopoda); Bibliography; Alphabetical index of the species.