Second image 30/05/2013
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The fine filigree patterning on the shell surface looks interesting - acquired by some form of Turing-style reaction-diffusion mechanism perhaps (other than the process that produces stripes as generally recognized)?
Interesting to see if banded/coloured snails also have this filigree surface pattern or whether, it is only in an "albino", that failure of a reaction-diffusion mechanism normally producing colour and stripes also results in a shift into filigree mode.
Interesting observation. It could be an albino Cepaea. I reckon the 'surface patterns' are the body inside showing through the transparent shell.
[I don't think it is Monancha cantiana?]
BMIG website: www.bmig.org.uk (centipedes, millipedes & woodlice)
BMIG Newsletters ~ www.bmig.org.uk/view/resource/bmig-newsletter
BMIG Bulletins ~ www.bmig.org.uk/view/resource/bmig-bulletin
Thanks for the comment. Could it have been parasitized by a snail-hunting fly?
I'm not familiar with the effects of Sciomyzid flies on their hosts.
Lat/Lng: 51.4337, -2.7624
OS grid ref: ST470707