POLYGYRA. 265 



the last abruptly deflected at the aperture, devious below, constricted and scro- 



biculated ; aperture very oblique, ear-shaped, ringent, very much narrowed ; 



peristome acute, patulously reflected, its terminations joined 



by an oblong, tongue-shaped, deeply entering, excavated fold, Fi s- 16 °- 



its right margin with a deeply seated lamella terminating in 



a reflected, filiform uvula-like point, the basal margin with an 



oblique, sinuous, tooth-like tubercle. Greater diameter 12, 



lesser 1 1 mill. ; height, 7 mill. 



Helix uvulifera, Shuttleworth, Bern. Mitt., 1852, 199. — 

 Chemnitz, ed. 2, II. 420, PL CXLVIII. Figs. 19, 20 (1853). 

 — Gould, Terr. Moll., III. 20. — W. G. B.xxey, Terr. Moll., IV. 75 ; L. k 

 Fr.-W. Sh., I. 87 (1869). — Pfeiffer, Mon. Hel. Yiv., III. 267. — Bland, 

 Ann. N. Y. Lye. N. H., VII. 34, Fig. 13 (1858). 



Helix florid if era, Reeve, Con. Icon., No. 699 (Aug. 1852). 



Helix aurieulata, minor, F£russac, Hist., PL I. Fig. 3? (teste Pfeiffer)- 



Dcedalochila uvulifera, Tryon, Am. Journ. Conch., III. 157 (1867). 



Found plentifully on the Florida Keys, Key West, Little Sarazota Bay, Long 

 Key, Florida, Dallas, and at Cape Sable. As I also have specimens from 

 Corpus Christi, it probably inhabits the whole Gulf coast of the Southern 

 Region. 



P. uvulifera may be distinguished from P. aurieulata by the character of the 



peristome, which is equally produced from the superior angle of the parietal 



process, to the base of the inferior tooth or fold, where it 



Fig. 161. j s reflected, sometimes appressed to the last whorl. The 



lower angle of the parietal process is connected with the 



inner termination of the peristome by a flat, more or less 



developed callus. The umbilical region is less open, and 



>f P. uvulifera. there is no groove within it on the last whorl. 



Jaw low, arcuate, ends blunt, anterior surface with about 

 13 ribs, denticulating either margin. 



Lingual membrane (PI. VI. Fig. B) with 23—1—23 teeth. There are about 

 8 perfect laterals. 



Genitalia as in P. aurieulata. 



Polygyra auriformis, Bland. 



Shell rimately perforate, above depressed, with rib-like striae, beneath in- 

 flated, convex, almost smooth, and with microscopic spiral lines ; white, or 

 brown horn-color, thin ; spire very short ; whorls 5| - 6, rather flat, the last de- 

 flected, and shortly turned outwards from the preceding whorl, constricted, 

 scarcely scrobiculate ; aperture sub-horizontal, ear-shaped, contracted ; peri- 

 stome acute, continuous, the margins joined by a short linguiform fold, entering 

 within the aperture ; the right margin with an obtuse submarginal lamella, and 

 the base with an oblique, sinuous, tooth-like fold. Greater diameter \l\, lesser 

 10 mill.; height, 6 mill. 



