Send Ideas to: Marie

Data:

hello i am currently doing a collection on marine molluscs for my course and have identified about 30 so far, having trouble with these two could you help please, not sure if they are just eroded to look different, or if one is a crab! from castle beach on the south coast of cornwall. thank you m watson

Further Data:

hello again i have classed these as Anomia ephippium - but as the muscle scars are not clear it is hard to tell. also the paler flat shell i was guessing as the lower right valve but is it too pale? thank you. m watson

Discussions:

• The shells (1a & 1b) look rather thick for Anomia, and the bottom one (2a & 2b) definitely has an oyster-like ligament area. Ostrea edulis is the standard European oyster, though various oyster species are widely introduced and might be present. ... Dr. David C.

• I agree with David, these look like very worn specimens of _Ostrea edulis_.
  The ligament area often looks odd as the wear makes several layers visible at once. ...Liz S.

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