NORTH AMERICAN CONCHOLOGT. 



195 



Page. Name. Locality. 



167 Helix profTinda Say. Ohio. 



Helicella Richardi Fer. 



var. Tridopsis Richardi Beck. 



167 pulchella Mull, (var.) Ohio. 



H. paludosa Walk., Mont., &c. &c. 

 a. minuta Say. 



168 pura Alder, (var.) Ohio. 



Helix nitidula B Drap. 



lenticula Held. 



electrina Gould. 



nitida Risso. 

 Helicella nitidosa Beck. 

 Poliia nitidosa Held. 

 Zonites pur us Gray. 

 Helix striatula Gray. 



radiatula Alder. 

 Zonites radiatulus Gray. 

 Helix viridula Menke. 



clara Held. 

 Helicella viridula Beck. 

 Polita clara Held. 



169 pustula Fer. Texas. 



Helicodonta pustula Fer. 

 173 Sayi Binney. Vermont. 



//. diodonta Say. 

 176 solitaria Say. Ohio. 



Euryomphala solitaria Beck. 



176 spiuosa Lea. Alabama. 



('(irocolla spinosa Lea. 



177 striatella Anthony. Ohio. 



//. perspecliva Fer. 



178 subplana Binney. New York. 

 180 Texasiana Moric. Texas. 



Jf. triodoiita Jan. 



var. H. fatiijiata Binney. Alabama. 



Pohjijyra plirata Say. 



Tridopsis tridonta Beck. 



Pohj'jyra fatigiata Say. 

 180 thyroidea Say. New York. 



Helix thyroidus Say. 



var. Helicodonta thyroidus Say. Ohio. 



Mesodon leucodon Rafin. 



Tridopsis thyroidus Beck. 

 180 Townsendlana Lea. Wahlamat. 



