PLATE XXVII 



i. Feeding tracks left by Helix hortensis, Mull., when browsing on 

 the green algae on the bark of trees (after Rathay). 



2. Tracks left by an unknown slug feeding on the over-exposed 

 portions of a photographic print. 



3. Enlarged portion of the same showing the scratches made by the 

 teeth of the radula in each A-shaped lick. 



[All three reproduced by permission of the Malacological Society from their 

 "Proceedings," vol. vii., 1906.] 



