Forums SEASHELL-COLLECTOR

Found at Long Beach Island New Jersey.

They are both the same?  And what are they? Thank you.

Yes, both the same.  These are Crepidula fornicata, the common slipper shell or slipper limpet.  Unlike the other two shells you posted, which are both bivalves, this one is a gastropod, a "snail-type" shell.  These live attached to hard surfaces like rocks and other shells.  Sometimes they attach to one another, forming stacks.

http://academics.smcvt.edu/dfacey/Aquati...impet.html

http://en.wikipedia.org/wiki/Common_slipper_shell

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Thank you so much Paul---you are teaching me a lot!