Chaetopterus
Aphrodite
Amphihite
Limidus
B. Aphrodite
Crab
Aretticola
Milipede
Centipede
Mikimoto
Katu
Haeckel
Von Mohl
Unio
Mytilus
Teredo
Tridacna
Gastropoda
Scaphopoda
Bivalva
Cephalopoda
Teredo
Doris
Loligo
Octopus
thoracic appendages
foot
head appendages
none of these
Pila
Starfish
Housefly
Earthworm
Pila
Unio
Mytilus
Nautilus
elephant tusk shells
butterflies of the sea
lerrfons of the sea
cucumbers of the sea
Trochophore
Veliger
Glochidium
Muller's larva
prismatic layer
periostracum
nacre
mantle
book lungs
pulmonary sacs
gills
respiratory siphons
Sepia
Octopus
Aplysia
Doris
Echinodenns
Arthropods
Molluscs
Annelida
Chiton
Unio
Teredo
Nautilus
patella
limax
teredo
chiton
Sepia
Loligo
Patella
Nautilus
scallop
sea mussel
razor shell
any of these
Neoplina
Chiton
Dentalium
Patella
Pelecypoda
Scaphopoda
Bivalva
Gastropoda
external shell of cuttle fish
internal shell of cuttle fish
bones of octopus
calcareous matter of cuttle fish
a sensory organ for balancing
a sensory organ for smell
swimming organ
none of these
Gastropoda
Caphalopoda
Bivalvia
Scaphopoda
Pinctada
Unio
Anodonta
Ostrea
Sepia
Lamellidens
Chiron
Pila
Pila
Aplysia
Helix
Aphrodite
an annelid
an arthropod
an echinoderm
a mollusc
dentalium
cypraea
nautilus
pinctada
devilfish
cuttlefish
black mussel
sea hare
sea hare
Pond snail
fresh water mussel
chiton