In my garden my daugther Margo found a live specimen of Helix aspersa, with a thirty white mites crowling (0,1 - 0,2 mm) over the animal and going inside through the respiratory opening. (Helix aspersa is too common in my garden and I 'll examine other specimens) In my little library I could not find a paper about snails and mites living together or parasitory mites. Is there anybody who has made the same observation and is there some literature about this subject? M.C. Cadee, the Netherlands.