THE HAMILTON ASSOCIATION. II3 



Zonites indentatus, Var. This is the variety with the open 

 umbilicus. Rare. 

 ■' minisculus, Binney. Rare. 

 " ferrus, Morse. Rare. 

 " exigius, Stimpson. Rare. 

 '• multidentatus, Binney. Rare. 

 '•' fulvus, Drap. Common. 

 " milium, Morse. Rare. 

 " Binneyanus, Morse. Rare. 

 " suppressus, Say. Rather rare. 

 Helix (Patula) alternata, Say. Common. 

 " " perspectiva, Say. Rare. 



" " striatella Anth. Common. 



" " lineata, Say. Scarce, 



Punctum Pygmseum, Drap. Scarce. 

 Helix (Mesodon) Throides, Say. Common. 

 " " albolabris, Say. Common. 



" " Sayii, Binney. Rare. 



" (Stenotrema) monodon, Rack. Uncommon. 

 ' " " Var. Fraternum, Say. 



Var. Leaii, Ward. Rare. 

 " (Triodopsis) tridentata, Say. Common, 

 " " palliata, Say. Rather rare. 



" (Vallonia) pulchella, Miill. Common. 

 " " " Var. costata. Rare. 



" (Strobila) labrynthica, Say. Rare. 

 Pupa fallax, Say. Common but local. 

 " corticaria, Say. Rare. 

 " armifera, Say. Common but local. 

 " contracta, Say. Rather common. 

 " milium, Gould. Rare. 

 Vertigo ovata, Say. Rather rare. 

 " ventricosa, Morse. Rare. 

 " pentadon, Say. Rather common, 

 Ferussacia subcylindrica, Linn. Common. 

 Succinea avara, Say. Rather common. 

 " obliqua, Say. Common. 

 " ovalis, Gould. Common. 



