Although the Patell were described as symmetrical, there are several species of patelliform shells which are not symmetrical.
patelliform, oval or oblong, radiated; apex anterior, perforated.
Those which are not spiral, but simply conical, as the patelliform shells.
This order, which includes mollusca with haliotoid or patelliform shells, is divided into the following families: Fam.
patelliform; apex central; columellar lip septiform, leaving the aperture small.
patelliform pa·tel·li·form (pə-těl'ə-fôrm')
Shaped like the patella; pan-shaped.