18 FRIENDS WORTH KNOWING. 
snails at once seek out their habitual solitary retreats, and 
must be looked for under leaves, logs, and loose stones in 
THE UNDER SIDE OF A WEY CAlIP. 
the woods and pastures; at the roots of fern-tufts, lurk- 
ing in the moss beside mountain brooklets; hiding in the 
crevices of rocky banks and old walls, crawling over the 
mud at the edge of swampy pools, creeping in and out of 
the crannies of bark on aged trees, or clinging to the under 
side of the leaves. Some forms are so minute that they 
would not hide the letter o in this print, yet you will soon 
come to perceive them amid the grains of mnd adhering 
to the lower side of a soaked chip. 
For fresh-water species, various resorts are to be searched. 
Go to the torrents with rocky bottoms for the paludinas 
