MOLIiUBKS. 



40ft 



itsell along the surface of the water by the expanded arms used 

 as sails. These arms are in fact used to cover the shell, and it is 

 from these that the beautiful shell is secreted. The Argonaut 

 propels itself through the water by violently ejecting water from 

 the tube with which it, as well as the cuttle-fish, is furnished for 

 that purpose. The colors of the living animal of the Nautilus are 

 exceedingly beautiful. 



The arms of this creature are furnished with suckers. Its 

 shell, when the creature is living, is flexible and semi-transparent. 



Slugs and Snails are the terrestrial Gasteropods. 



The Slugs are well-known invaders of our gardens, and, 

 together with the Snail, the Caterpillar, and the mysterious 

 " Blight," are objects of the gardener's most intense hatred. The 

 Black Slug is usually found by hedge-banks, and in grassy mea^ 

 dows. It seldom ventures out by day, especially if the day be 

 bright ; but at night, when the dew is on the ground, it may be 

 seen trailing its dark length through the herbage. 



The Snail. — There are several species of the Snail, among 

 which the Edible Snail {Helix pomatia), the Belted Snail {Helix 



