Annelida
Moliusca
Echinodermata
Arthropoda
B. Moliusca
Chiton
Unio
Teredo
Nautilus
Pelecypoda
Scaphopoda
Bivalva
Gastropoda
book lungs
pulmonary sacs
gills
respiratory siphons
sea hare
Pond snail
fresh water mussel
chiton
devilfish
cuttlefish
black mussel
sea hare
Pila
Aplysia
Helix
Aphrodite
Gastropoda
Scaphopoda
Bivalva
Cephalopoda
Crab
Aretticola
Milipede
Centipede
Sepia
Lamellidens
Chiron
Pila
elephant tusk shells
butterflies of the sea
lerrfons of the sea
cucumbers of the sea
Sepia (Caphalopoda)
Uttio (Pelecypoda)
Dentalium (Scaphopoda)
Pila (Gastropoda)
pulmonary sac
ctenidia
book lungs
trachea
Pinctada
Unio
Anodonta
Ostrea
an annelid
an arthropod
an echinoderm
a mollusc
Pila
Starfish
Housefly
Earthworm
Chaetopterus
Aphrodite
Amphihite
Limidus
thoracic appendages
foot
head appendages
none of these
Nautilus
Pila
Argpnata
Unio
giant clam
giant squid
giant Snail
giant octopus
Trochophore
Veliger
Glochidium
Muller's larva
myoglobin
anthocyanin
haemocyanin
hemoglobin
Teredo
Doris
Loligo
Octopus
Gastropoda
Criton
Bivalvia
Monoplacophora
Unio
Mytilus
Teredo
Tridacna
Mikimoto
Katu
Haeckel
Von Mohl
prismatic layer
periostracum
nacre
mantle
Octopus
Sepia
Mytilus
Teredo
a sensory organ for balancing
a sensory organ for smell
swimming organ
none of these
Sepia
Octopus
Aplysia
Doris
Annelida
Arthropoda
Mollusca
Chordata