Lamellaria perspicua

Lamellaria perspicua

Observation - Lamellaria perspicua - UK and Ireland. Description: I have quite a few inconclusive pictures of this. I have been racking my brains, books and internet for over a year to conclude that it might be Onchidella celtica. There is one other posted here http://www.ispotnature.org/node/393745 which looks like my

I have quite a few inconclusive pictures of this.
I have been racking my brains, books and internet for over a year to conclude that it might be Onchidella celtica. There is one other posted here http://www.ispotnature.org/node/393745 which looks like my first picture but maybe not the second even the third. But is was a flexible, even malleable soft-backed 'limpet'.
My pale version figures here http://www.nmr-pics.nl/Onchidiidae/album/slides/Onchidella%20celtica.html.
Pictures 4-6 from another site. Should they have an apparent orifice?
12/12/14 ADDED (research link) http://campillos.ucmerced.edu/~bdayrat/Onchidiidae.html
EDIT Feb 2015 - Title change (from Onchidella celtica)See comments