CHAPTER VIII 
INSTINCT, INTELLIGENCE, AND USES 
NSTINCT and intelligence as we understand 
them are hardly qualities that one would look for 
in molluscs, nevertheless the homing instinct is dis- 
played by more than one. The Limpet is well 
known to return after each grazing excursion to the 
selfsame spot on the rocks to which it has fitted its 
shell. The Common Garden Snail and the Slugs 
punctually return after each nocturnal ramble to the 
nook or corner, crack or cranny that each has made 
its home. A somewhat higher order of intelligence 
is that cited by Darwin on the authority of 
Mr. Lonsdale, in which a Roman Snail (Helix 
pomatia) made its way from an ill-stocked garden 
over the wall to one rich in plant-life, and returning, 
fetched a weakly companion, which it piloted to the 
land of plenty it had discovered. 
Madame Power declares that she once saw an 
Octopus in her aquarium watch a Pinna till the shell 
was well open and then deliberately place a fragment 
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