400 THE MOUNTAIN. 



Helix albolabris, multilineata, (not east of Alleghany,) 

 pennsylvanica, thyroidus, dentifera, palliata, appressa, mono- 

 don, hirsuta, concava, pulchella, profunda, sayi, tridentata, 

 labyrinthica, intertexta, alternata, fuliginosa, inonata, cel- 

 laria, arborea, indentata, interna, suppressa, lineata. 



BULIMUS. General character, like Helix. Most of them 

 belong to the tropics. 



BULIMUS lubricus, (Mul.) Of this shell Binney remarks : 

 " This little species, which is hardly larger than a grain of 

 wheat, is certainly identical with the European shell. It has 

 a vast range, being found on the bark and leaves of decay- 

 ing trees in forests and groves." It is recognized by its 

 "peculiarly brilliant reflections." 



BULIMUS exiguus, (Say.) The " length of this species is 

 one-fifteenth, breadth, one-fortieth of an inch." This ex- 

 ceedingly minute shell has a wide range, "being common in 

 all the Northern and Middle States." "Found under stones, 

 wood, and moss, in damp places." 



BULIMUS fallax, (Gould.) A very small shell; "length, 

 one-fifth, diameter, one-fifteenth of an inch." Wide range. 

 These are the only species noticed on the Alleghany. 



PUPA. " Shells elongated, cylindrical or accuminate with 

 numerous whorls," etc. This genus is widely distributed 

 over the globe. Many of these little shells are very beau- 

 tiful when examined closely, but from their minuteness, re- 

 quire great care to find or examine them. They live under 

 fallen leaves, branches, and bark that is decaying, also on 

 stumps and logs in forests ; others on moss, stones, etc. in 

 fields ; others about water and swamps, seeming to require 

 much moisture for their comfort. " They feed on decaying 

 vegetables, keeping in the shade and hidden." "In winter 

 they bury themselves in the earth or under the leaves." 



PUPA armifera, (Say.) "Length, three-sixteenths of an 

 inch ; diameter, half of the length. " This the largest spe- 

 cies, though a small shell, and common. 



PUPA contracta, (Say.) "Length, one-tenth, diameter, 



