Though these individuals are worn (which is not uncommon), the ridges which are more prominent on the posterior end can still be seen if studied carefully. The two upper individuals have the anterior end to the right, while in the lower individual anterior is to the left.
Lottia digitalis is a fairly tall limpet with the apex far forward (in the anterior 1/4 of the shell's length). In some individuals (not these) it actually overhangs the front of the shell.
The horseshoe-shaped scar, with the open end to the anterior (right) can be clearly seen in this shell. Note also the brown apical blotch (which in this individual is mostly behind the apex)
