OF SPECIES. 



243 



In other Parts of the Globe. 



Habits. 



Syria. Asia Minor. North 

 Africa. Madeira. 



Siberia 



North Africa. Madeira . 



Siberia 



Azores. Madeira . . . 



Siberia 



North Africa 



Siberia 



Siberia. North Africa 



Siberia 



Siberia. North Africa 



Canary Islands .... 



Of secluded habits, buried under stones or in tbe soil. 

 In damp places, under stones and among moss. 

 Adhering to stones and plants in shallow water. 

 Adhering to stems and leaves of plants in shallow water. 

 In gently flowing rivers, brooks, canals, ponds, etc. 

 In woods and gardens in shady places, about wells or 



pumps. 

 In gardens and roadside meadows, in damp places. 

 On muddy banks and inlets of the Thames. 

 Widely sparingly distributed in wooded districts. 

 Among moss and lichens in crevices of walls. 



Abundant in chalky or sandy places near the sea. 



In wooded districts, among decayed leaves. 



On old walls, under stones, or among trees, moss, etc. 



In gentle streams and still water. 



In brackish ditches near the Thames at Greenwich. 



In gentle streams and still waters. 



Among moss or at the roots of grass in wet places. 



In woods and hedges, among the roots of shrubs. 



Mostly in beech woods, about the trunks of trees. 

 In crevices of walls, rocks, and trees, or under stones. 



Among dead leaves or beneath the bark of trees. 



In crevices of rocks and timber, among wet moss, or 



under stones on the banks of rivers near the sea. 

 In mud or among the roots of plants near the sea. 



In mud or under stones about the mouths of tidal 



rivers. 

 In all waters, both flowing and stagnant. 

 In lakes, canals, ponds, etc. 

 In canals and ponds. 

 In canals. 



In rivers and canals. 



Under stones and about the roots of shrubs. 



In canals, rivers, docks, aqueducts, water-pipes, etc. 



e2 



