INTRODUCTION. 7 



should the weeds be examined, but the mud should be 

 sifted with the scoop in search of bivalves. 



By the water's edge the stalks and leaves of flags and 

 sedges should be examined for the Succinice, which are 

 amphibious. 



On land, search all moist and shady spots, especially 

 during and after rain, under logs, stones, among dead 

 leaves and decaying vegetation, among nettles and healthy 

 vegetation, on the bark of trees, and at their roots among 

 the moss, on old stone walls, and in damp cellars. The 

 rejectamenta of rivers, too, yield a fruitful harvest. 



A good plan for dealing with dead leaves and moss is to 

 take a quantity home, spread it out to dry, and search the 

 siftings. This saves much time, and often yields a good 

 supply of Zonites, minute Helices, Pupce, &c. But this should 

 be done with judgment as with the moss the eggs also 

 come away, and the habitat is destroyed. 



It often happens that we come across a good shell in a 

 likely place, and wherever we find a single individual we 

 may be pretty certain that some of his immediate relatives 

 are not very far distant. A large, flat stone, log, or piece 

 of matting laid over the place will frequently be found on 

 examination, after a day or two, to have the desired object 

 adhering to its under side. I have frequently set " traps" 

 of this nature, which I visited periodically, and which have 

 been very productive. 



It may be remembered that sandy or peaty soils yield 



