102 THE NAUTILUS. 



Helicina orbiculata Say. 



Helicina orbiculafa var. clappi Pils. Mas. 



Thysanophora plagioptycha Shutt. 



Polygyra cereolus f. carpenteriana Bid. 



Polygyra uvulifera Shutt. 



Bifidaria contracta Say. 



Bifidaria p. hordeacella Pils. 



Bifidaria rupicola Say. 



Vertigo variolosa Gld. 



Microceramus floridanus Pils. 



Euglandina r. parallela Binn. 



Vitrea indentata Say. 



Vitrea dalliana ' Siinp ' Pils. 



Guppya gundlachi Pfr. 



Zonitoides minuscula Binn. 



Zonitoides singleyana Pils. 



Marco, N. end of Marco Key 

 Polygyra cereolus f. carpenteriana Bid. 

 Bifidaria p. hordeacella Pils. 

 Bifidaria rupicola Say. 

 Euglandina rosea Fer. 

 Euglandina rosea parallela Binn. 

 Vitrea dalliana ' Simp.' Pils. 

 Guppya gundlachi Pfr. 



Mound Key, Estero Bay. 

 Truncatella caribseensis succinea C. B. Ad. 

 Truncatella bilabiata Pfr. 

 Helicina orbiculata Say. 

 Thysanophora plagioptycha Shutt. 

 Polygyra cereolus f. carpenteriana Bid 

 Pupoides modicus Gld. 

 Bifidaria contracta Say. 

 Bifidaria p. hordeacella Pils. 

 Bifidaria rupicola Say. 

 Euglandina rosea parallela Binn. 

 Euglandina rosea minor Binn. 

 Guppya gundlachi Pfr. 

 Zonitoides minuscula Binn. 

 Succinea floridana Pils. 



