A Typical Univalve Mollusk 



SOFT PARTS OF A UNIVALVE 



(Mantle chamber laid open) 



Pyrula sp. 



'^^- *:._ ^., 



proboscis 



tentacles 



foot 



siphon 



manile 



mantle chamber 



osphradimn 



giUs 



oesophagus 



heart 



intestine 



duct of male reproductive gland 



kidney 



liver 



female reproductive gland 



male reproductive gland 



A TYPICAL T7NIVALVE 

 SHELL 

 Fear Conch, Fulgur canaliGidfUa 

 At apex 

 5, suture 



B, shoulder of whorl 

 E, spire 

 Jf, body whorl 

 £7, columella or inner lip 

 Z, outer lip 

 Pf aperture 

 JZ, anterior canal 



