CHAPTER V 
FOOD, HABITS, ETC. 
HE food of the Mollusca is quite as varied as 
their habit of life. 
That most of the land Mollusca are vegetable 
feeders is only too well known, but the worst 
offenders are certain of the Slugs that bury by day 
and only emerge to their feeding-grounds by night ; 
while the larger kinds, that scorn subterfuge and con- 
sequently bear the onus of the blame, more frequently 
feed on fungi and lichens, and reject green food. 
Some other Land Snails prefer decomposing vegeta- 
tion. The Chitons, Limpets, and holostomatous Sea 
Snails are nearly all vegetarians. In procuring their 
food these vegetable consumers rasp the surface of 
the plant tissues with the radula, and as they move 
along, feeding as they go, they leave a track behind 
them. The marks left by Limpets may frequently 
be observed on the rocks off which they rasp the 
small algz, while the similar tracks made by Snails 
may under favourable conditions be seen on palings 
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