20 THE NAUTILUS. 



LOSSMAN'S KEY, Monroe County. Collected by Clarence B. 

 Moore. 



Heliciua orbiculata Say. 

 Helicina o. clappi Pils. 

 Thysanophora selenimi Gld. 

 Thysanophora plagioptycha Shutt. 

 Thysanophora caeca Guppy. 

 Polygyra cereolus Miihl. 

 Polygyra c. carpenteriana Bid. 

 Polygyra septemvolva Say. 

 Microceramus pontificus Gld. 

 Strobilops hubbardi Br. 

 Bifidaria rupicola Say. 

 Bifidaria contracta Say. 

 Vitrea indentata Say. 

 Vitrea dalliana ' Simps.' Pils. 

 Euconulus chersinus Say. 

 Guppy a gundlachi Pfr. 

 Zonitoides arborea Say. 

 Zonitoides minuscula Binn. 

 Zonitoides minuscula alachuana Dall. 

 Zonitoides singleyana Pils. 



" MC!LVAINE'S PLACE," on a small key two miles northeast of 

 Marco, Lee Co. Collected by Clarence B. Moore. 

 Polygyra c. carpenteriana Bid. 

 Bifidaria p. hordeacella Pils. 

 Bifidaria rupicola Say. 

 Bifidaria contracta Say. 

 Vertigo rugosula oralis St. 

 Guppya gundlachi Pfr. 

 Zonitoides minuscula Binn. 

 Zonitoides singleyana Pils. 



LITTLE MARCO KEY, Lee Co. Collected by Clarence B. Moore. 

 Microceramus floridanus Pils. 



MORMON KEY, Monroe Co. Collected by Clarence B. Moore. 

 Truncatella caribseensis ' Sby.' Rve. 

 Truncatella bilabiata Pfr. 

 Polygyra c. carpenteriana Bid. 



