· Johston coined the term Mollusca (Mollusks = soft) meaning soft-bodied animals. · It is the second largest phylum after Arthropoda. · Study of Mollusca = Malacology · Study of the shell of mollusca = Conchology VVI Examples of Phylum Mollusca for Entrance Exams are: Neopilina (Connecting link between Annelida and Mollusca) Pila (Land snail) Aplysia (Sea horse) Patella (Limpet) Cyprea (Cowrie) Helix (Sand snail) Unio (Freshwater mussel) Mytilus (Marine or sea mussel) Pecten (Scallop) Ostrea (Oyster) Spondylus (Edible oyster) Pinctada (Pearl oyster) Teredo (Shipworm) destruct the wood in seawater. Sea hare Octopus (Devilfish) Sea mice or Sea mica (Chiton) Isochiton Chaetopleura Dentalium Cadulus Sepia (Cuttlefish) Sea lemon Unio (Freshwater mussel) Squids (Loligo) Characteristics of Phylum Mollusca · Triploblastic, soft-bodied, coelomate animals with organ system level of body organization and tube within a tube body plan. · Habitat – Mostly mar...