The Water Relations of Snails and Slugs I. Weight Rhythms in Helix Pomatia L

PAGE I . I n t r o d u c t i o n 3 2 8 I I . D e s c r i p t i o n o f t h e w e i g h t r h y t h m . . . . . . 3 2 9 I I I . R e l a t i o n t o a c t i v i t y . . . . . . . 3 3 1 I V . R e l a t i o n t o e n v i r o n m e n t a l v a r i a t i o n s 3 3 2 V . R e l a t i o n t o u p t a k e o f f o o d a n d w a t e r . . . . . 3 3 4 V I . B e h a v i o u r o f s n a i l s i n h u m i d a t m o s p h e r e s . . . . 3 3 8 V I I . D i s c u s s i o n 3 4 1 V I I I . S u m m a r y . . . . . . . . . . 3 4 2