- pallets
- pallial
- pallial cavity
- pallial complex
- pallial foramen
- pallial gill
- pallial line
- pallial sinus
- pallial tentacle
- papilla
- parapodia
- parietal lip
- patelliform
- pedal disc
- pedal gland
- pedal groove
- pedal pit
- pedunculate
- pelagic
- penis
- penultimate whorl
- pericardium
- periostracum
- periphery
- peristome
- pharynx
- pipe
- planktotrophic
- planorboid
- pleurembolic proboscis
- pleuroproctic
- plicate
- polygyrous spiral
- posterior
- posterior adductor scar
- posterior disc
- posterior margin
- proboscis
- prodissoconch
- propodium
- prosocline
- prostate gland
- protoconch
- protoplax
- pseudobranch
- purple gland