SIMPSON CONTRIBUTIONS TO THE MOLLUSCA OF FLORIDA. 65 



Glandina truncata, var. parallela W. G. B. Undoubtedly only a 

 form of G. truncata. The heavy shell with cylindrical or compressed 

 body whorl, I found mostly on shell mounds, where they seem to live 

 on and around Opuntia polyantha; while the typical truncata was 

 most abundant around ponds in pine woods. A small, red form was 

 obtained at Evans' plantation, and another, something like G. texasiana 

 in form, but shorter and more solid, and of a light salmon color, was 

 found on Cape Sable. 



Zonites arboreus Say. Rather plentiful in hammocks in and around 

 decaying logs; Sumpter County, Cunningham. 



Zonites indentatus Say. Usually found with Z. arboreus; Sumpter 

 County, Cunningham. 



Zonites gundlachi Pfr. Evans' plantation; Manatee County. 



Zonites fulvus Drap. Evans' plantation; Monroe County; Cedar 

 Hammock ; and hammock near the village of Manatee, with Z. gund- 

 lachi. 



Zonites minusculus Binn. Manatee County, several localities; 

 Evans' plantation. 



*Zon : tes suppressus Say. Gainesville. J. B. Upson; Fernandina, 

 Henry Hemphill. I have a shell from Terraciea Island, which I think 

 is the same. 



Tebennophorus carolinensis Bosc. Terraciea Island, in heavy ham- 

 mock. 



Microphysa vortex Pfr. Goodland Point; Evans' plantation. Tol- 

 erably abundant in both localities. 



Helix ( Polygyra) auriculata Say. One of the most common land 

 shells of Manatee County. Abounding around ponds in pine and ham- 

 mock woods. The shell varies a good deal in size. 



Helix (Polygyra) uvulifera Shutt. Found abundantly in a ham- 

 mock south of the Manatee River. 



* Helix ( Polygyra) postelliana Bid. Callahan, J. B. Upson. 



* Helix (Polygyra) aitrifoi mis Bid. Volusia County, Cunningham. 



Helix (Polygyra) [cereolus Miihl. Anna Maria, Passage, Mullet 

 and Long Keys. 



Helix (Polygyra ) carpenteriana Bid. A very common form on the 

 mainland near the sea. On Rabbit Key, near Cape Romaine, I found 

 this species under Agave rigida, in such quantities that it could be 

 scraped up in handfuls, and nearly all living. 



Helix (Polygyra) septemvolva Say. Keys along the mouth of 

 Tampa Bay. There is no doubt now that the above three are merely 

 forms of one species, which Mr. Dall unites under the oldest name, 

 Helix cereblus Miihl. In the summer of 1884, I found on Mullet 

 Key a great number of living specimens of the above species, varying 

 through every range of size and number of whorls from the smallest 

 carpenteriana to the largest septemvolva or cereolus, and having an 



[Proo. D. A. N. 8., Vol. V.] 9 [February 19, 1889.] 



