Which patella?

[Emma]

Hi again!

A couple of weeks ago there was a big storm in the Mediterranean and I went down to the beach the following day. Among the things I found were these two patella. Patellas are a hard species to classify at the best of times, but these two specimens have growths on top. I don't want to remove the growths, as I think they add character. My guess is they are Patella ulyssiponensis or Patella caerula, however they don't really look like P. caerula to me. They are definetely not P. rustica, the colouring inside is all wrong. So, any help would be great. And, if you know the name of the growths on top of the shell, please let me know.

Best wishes,

Emma.

P.s. The beach is Cambrils, in the Tarragona area of Spain.