360 A MANUAL OF AMERICAN LAND SHELLS. 



Found uear Indiaiiola, Calhoun County, Texas; Bonaventure Ceme- 

 tery, near tSavauuab, Ga. ; also Archer, Alachua County, Florida, by 

 W. H. Dall (1885). It thus must have a wide range over the Southern 

 Region. It was subsequently discovered at Bellevue, in the parish of 

 St. Andrew, island of Jamaica, and described as H. Vendryesiana. 

 Gloyne mentions the parietal lamella only, but there are others as de- 

 scribed by Brown. The species is, in fact, allied to 8. labyrinthica, Say, 

 and not to P<)li/</ijra paludosa. to which group it is referred by Gloyne. 



The distribution of 8. Huhbardi is certainly curious, but it may be 

 observed that 8. 8trebeli, Pfr., which is extremely like, if not identical 

 with, labyrinthica, belongs to the Mexican fauna. 



For jaw and lingual dentition (Terr. Moll., V, Plate V, Fig. iS") 

 see p. 203. 



Genitalia not observed. 



POI^yOVRA, Say. 



Animal heliciforra ; mantle posterior ; other characters as in Patula. 



Shell umbilicated or perforated, orbicularly flattened, obliquely and 

 Fig. 390. costulately striate; whorls 5-7^, gradually increas- 



ing, the last anteriorly constricted, briefly de- 

 flected, inflated below, devious, the penultimate 

 Animaiof p. geptemroha. ^Jjq,! plainly couspicuous, verj oftcu constrictiug 

 the rimate umbilicus ; ajierture subreniform or irregularly sinuate ; 

 peristome narrowly reflected, heavy, its margins usually dentate, and 

 joined by a triangular dentiform callus, obliquely entering on the pari- 

 etal wall of the aperture. 



Interior and Southern Kegion, especially the latter in North Amer- 

 ica. It is also represented in the West Indian Islands, in Mexico, and 

 Yucatan, and one si>ecies is found in Bolivia. 



Jaw high, arcuate, ends scarcely iittenuated, blunt, cutting edge 

 without median projection ; anterior surface with numerous stout, sep- 

 arated ribs, (ItMiticulatiiig either margin. I have counted 8 ribs in 



Fi(;.3!»i. />. renfro.su'a ; 14 in pnsfula ; 10 in auricidata ; 12 in Pontell- 

 iaiia ; 12 in Carpenteriana ; H) m piistuloides ; 12 in avara ; 

 over 14 in ccreolu.s : 10 in cspiloea ; 13 in ucuUfera ; 10 in 



Jiwof^ Texofiiana and tridontoides ; 12 in TroostUma ; 11 in lepo- 

 p. uentrosuia. ^,.^^^^ ^ ^~ ^^^ ^loorcana ; 20 in fasti(/ans ; 7 in septemvolva ; 10 

 in Febigeri ; in Hazardi and aim/ormis they are also numerous. I have 

 had no op))ortuiiity of examining the jaw in the other spe(;ies found 

 within t)ur limits — Hindsi, tholus, hippocrcpiftj oppilata, DorfeuiUiana, 

 Arvidn<v. 



