Both the squid & the snail are members of this animal phylum whose name is from the Latin for "soft"
They occupy a vast range of habitats however both aquatic and terrestrial, from 
the ... Muscles, Octopus, Oysters, Periwinkles, Scallops, Snails, Squid, Whelks, 
Winkles and... [DOC] [TLE] Taxonomy of the Phylum Mollusca - Man and Mollusc [PAR] The name Mollusca comes from the Latin word molluscus meaning soft.