THE HAMILTON ASSOCIATION. ri^ 



GENUS PUNCTUM, MORSE. 

 PUNCTUM PYGM^UM MINUTISSIMUM, Lea. 



Our smallest shell ; owing to minute size difficult to find, a few 

 taken on the under side of a board in one of the ravines 

 off the Flamboro' road. 



GENUS HELIX, LINNE. 



SUB-GENUS POLYGYRA, SAY. 



{Section Mesodon, Rafinesqtie). 



Helix thyroides. Say. 



Local; fond of shady hillsides. 

 Helix albolabris, Say. 



A larger shell ; more abundant, and also more widely distributed. 

 Helix sayii, Bitiney. 



Very local ; taken in some abundance in November under dead 

 leaves on a steep bank formed by the railway intersecting one 

 of the branches of the Waterdown ravine, confined to a very 

 limited extent of ground. 



[Section Stenotrema, Raf.) 

 Helix monodon, Rack. 

 Rare on dry banks. 

 Helix monodon fraterna, Say. 

 Common ; prefers dry situations. 



{Section Triodopsis, Raf.) 

 Helix tridentata, Say. 



Common generally around Hamilton. 



Helix palliata. Say. 



Rare ; may be found in sheltered spots under stones and logs 

 on banks, and along side of mountain ; appears to be 

 solitary in its habits- 



{Section Vallonia, Risso), 

 Helix Pulchella, Miill. 



Plentiiul under logs in damp meadows. 



sub-genus strobila, morse. 

 Helix labyrinthica, Say. 



Rare ; a few taken in a run in a small piece of open wood to- 

 wards the Beach. 



