Diagram of L. littorea

Semi-schematic diagram illustrating some of the external anatomical features of
the marine prosobranch gastropod L. littorea.  The animal has been removed from
the shell and is viewed from the left hand side.

     aur   =   auricle
     cm    =   columellar muscle
     ct    =   ctenidium (gills)
     dg/g  =   digestive gland and gonads (visceral complex)
     e     =   eye
     ebv   =   efferent branchial vessel
     f     =   foot
     hg    =   hypobranchial gland
     k     =   kidney
     med   =   mantle edge
     ng    =   nephridial gland
     op    =   operculum
     os    =   osphradium
     pa    =   posterior aorta
     pcc   =   pericardial cavity
     poe   =   posterior oesophagus
     s     =   stomach
     tn    =   tentacle
     ven   =   ventricle