Our British Snails 



23 



The figures of the snail and the skig below 

 are introduced to give further knowledge of the 

 soft parts. B is the body, soft and with a surface 

 generally wrinkled or covered with small tubercles. 

 F is the foot or muscular pad which forms the 

 foot by the wavelike contractions of which it 

 moves. H is the head, bearing the tentacles Tj 



F^ "BO 



Body of snail and of slug. 



and To, of which the upper pair have the eyes, E. 

 The mantle, M, makes the shell by secreting lime, 

 etc. In it is the breathing orifice, BO, obvious 

 in the slug, but in the snail nearly hidden by the 

 shell. L in the snail is the spiral part, the liver, 

 and it occupies a large part of the shell. 



Without going into details of classification 

 and anatomy, which would only deter or puzzle 

 a beginner, let me take two typical molluscs 



