1906. 



NATURAL SCIENCES OF PHILADELPHIA. 



535 



Polygyra uncifera. 

 hlandiana. 

 inflecta media, 

 edentata. 

 e. magazinensis. 

 obstricta occidentalis. 

 neglecta. 

 cragini. 



exoleta ozarkensis. 

 divesta. 



Polygyra indianorum. 



i. lioderma. 



hinneyana. 



6. chastatensis. 



kiowaensis. 

 Gastrodonta demissa hrittsi. 

 Omphalina fuliginosa ozarkensis. 

 Vitrea aulacogyra. 



significans. 



simpsoni. 



2. Carolinian species occurring in the Ozark uplift or on its borders 

 (many of them extending also into the Austroriparian or Sonoran^ 

 the latter marked S.) : 



Polygyra stenotrema. 



fraterna. 



appressa. 



a. perigrapta. 



inflecta. 



elevata. 



albolabris alleni. 



thyroides. 



clausa. 

 Circinaria concava. 

 Omphalina fuliginosa. 



fridbilis. 

 Gastrodonta ligera. 

 Zonitoides arbor ea (S.). 



minuscula (S.). 

 Vitrea hammonis.^ 



indentata (S,). 



petrophila. 



multidentata. 



Euconidus cher sinus dentatus. 

 Agriolimax campestris (S.). 

 Pyramidida solitaria. 



alternata. 



perspectiva. 

 Helicodiscus parallelus. 

 Philomycus carolinensis. 

 Pupoides marginatus (S.). 

 Bifldaria armifera (S.). 



contractu (S.). 



procera (S.). 



pentodon Say (S.). 



tappaniana Ad . ( S . ) . 

 Cochlicopa lubrica.^ 

 Vallonia parvula. 

 Succinea retusa. 



ovalis Say. 



grosvenori (S.). 



avaj^a (S.). 



3. Austroriparian and Sonoran species (the latter marked S.)^ 

 extending into the Ozark uplift or to its borders. 



' These are more properly Boreal species, extending downward, however,, 

 through and below the Alleghanian (Transition) zone. 



