ILLUSTRATIONS: 
Diagram of a Raised Beach, ete., at Birnbeck Cove, Weston- 
super-Mare (after Day), in text, p. xv. 
Plate I (facing page xxv). 
Fig. 1. The coast between Berrow and Burnham. Helix 
aspersa and Helix nemoralis are abundant on the dunes, 
Fig. 2. Shifting Dunes near Berrow, capped with Marram 
Grass. <A well-known haunt of Helicella barbara. 
Plate II (facing page xxxvii). 
Ash Copse and Limestone Cliff. Situations in which 
Ena montana may be found. 
Plate ILI (facing page 26). 
Rock Shelters of Helix aspersa in Carboniferous Lime- 
stone on Brean Down, W eston-super-Mare. 
Plate LV (facing page 28). 
The Garden Snail ( Helix aspersa), shewing varieties and 
sealarid forms. 
Plate V (facing page 47). 
Pond Snails (Genus Limnea). The six British repre- 
sentatives of the genus. 
