| |  | | Pity I still can't have the book and give it a proper name. And a pity it had to wash up where it doesn't belong.
 Weeks later, after seeing my share of these things, I looked in the right book.
 1] They are purple olive snails.
 2] The wonderful news is that they do belong in the wet sand, tunneling along and scavenging for scavengeable stuff.
 
 | 
 
 | 
   |