EASTERN PROVINCE SOUTHERN REGION SPECIES. Sid 



Polygryrii cereoliis, Muhlfeldt. 



Shell broadly umbilicated, subcarinated, discoidal, white, scarcely 

 convex, and with rib-like strife above, smooth and ^ fig. 413. 

 plane below ; whorls 7 or 8, gradually increasing, the 

 last subcarinated, briefly deflected at the aperture, 

 constricted behind the peristome ; below three full 

 whorls revolving on the same plane, the balance vis- 

 ible in the broad, pervious umbilicus, the penultimate 

 somewhat lapi)ed over by the last, the antepenulti- 

 mate the most swollen ; aperture remote from the 

 axis, subreniform ; peristome white, thickened, acutelj' • 

 reflected, somewhat angular at the carination of the 

 last whorl, continuous, its terminations joined by tri- 

 angular, elevated, acutely pointed callus ; on the parietal side of the 

 inner fourth of the last, and running round rather obliquely within from 

 two-thirds to three-fourths of the penultimate whorl, thus revolving 

 nearly once round the shell, is a threadlike, elevated, white internal 

 lamina. Greater diameter 14, lesser 12^"""; height, S^"""". A large 

 specimen, 20"'™ greater diameter. 



i?e?iic cereoZws, Muiilfp:ldt, Berlin Mus.,viii (1816), 41, pL ii,fig. 18. — Pfeiffer, Mon. 



Hel. Viv.,i,408; in Chemnitz, cd. 2, i, 378, pi. Ixvi, figs. 1-3.— ?Reea^e, Con. 



Icon., 698.— Bland, Ann. N. Y. Lye, vii, 1.36, fig. 2.— W. G. Binney, Terr. 



Moll., iv,80, part, pi. lxxvii,fig. 23 ; L. & Fr.-W. Sb., 1, 106, fig. 182 (1869). 

 Eelix septemvolva, ? Ferussac, Hist... pi. li, fig. 6. — ? Wood, Index Test. Sqppl., vii, 



fig. 14 ; ed. Hanley, 226, tig. 14.— ? Sowerby, Conch. Man., ed. 2, fig. 275. 



—Binney, Bost. Journ. Nat. Hist., iii, 391, pi. xxix,fig. 4(1840); Terr. Moll.,. 



ii, 196, 111. xxxviii, central line. — Deshayes, in F^r., Hist. ,5. 

 HtUxplanorbuIa, ? Lamarck An. s. Vert., vi, 89. — ?DESHAYES,inLAM., viii, 67; Encycl. 



Metb., ii, 208 (18 30).— ? Delessert, Rec, pi. xxvi, fig. 3 (1841).—? Chenu,, 



Ilhist. Coucb., pi. xii, fig. 3. 

 Helix cereolus, var. laminifera, VV. G. Binney, Proc. Acad. Nat. Sci. Pbila., 1858, 200, 



no descr. 

 Folygyra cereolus, TRYom, Am. Jonrn. Concb., iii, 158, pi. xi, figs. 19-21 (1867). — W. 



G. Binney, Terr. Moll., v, 283. 



Indian Eiver, Indian Key, Key West, Egmont Key, Florida. It is a 

 species of the Florida Subregion. 



The umbilical opening, in sjiecimens of about equal size, is only half 

 the width of that in septemvolva; the last whorl is wider, especially 

 towards its termination at the aperture, more inflated, and rather less 

 acutely carinated. The aperture is more orbicular, more contracted, 

 and the peristome more expanded and acutely reflected, and at its 

 junction below with its pillar lip more closely appressed to the last 



