James,

Are the sides lower than the ends, so the shell rests on them and can be
rocked back and forth on a flat table? If so, try Fissurella fascicularis
Lamarck, 1822. The locality is a little far north for this species but
other Caribbean fauna has shown up there as well.

Peggy Williams

>I have a very small fissurella from Pensacola Beach,
>Florida. It is about 1cm from base to top, quite high(probably
>because of calm waters) and is reddish brown in color. There is fine
>cross-hatch sculpture all over the shell. The interior is faintly
>nacreous.
>the shell is higher on the front than on the back.

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