8S 



LAND AND FRESH-WATER SHELLS OF N. A. [PART I. 



Fig. 159. 



Helix uvulifera, 

 eolarged. 



at the aperture, devious below, constricted aud scrobiculated ; 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, its right 

 margin witli a deeply seated lamella terminating in a re- 

 flected, filiform uvula-like point, the basal margin with 

 an oblique, sinuose tooth-like tubercle. Greater diam. 12, 

 lesser 11 ; height 7 mill. 



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

 Chkmnitz, ed. 2, II, 420, pi. cxlviii, f. 19, 20 (1853). 

 —Gould, Terr. Moll. Ill, 20.— W. G. Binney, Terr. 

 Moll. IV, 75 (fig.).— Pfeii-fek, Mou. Hel. Viv. Ill, 2G7.— Bland, 

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

 Helix forulifera, Reeve, Con. Icon. no. 699 (Aug. 1852). 

 Helix auriculata, minor, Ferussac, Hist. pi. 1, f. 3 ? (teste Pfeiffer). 

 Dcedalochila uvulifera, Tryon, Am. Journ. Conch. Ill, 157, pi. xi, f. 15, 

 16 (1867). 



Found plentifully on the Florida Keys. As I also have speci- 

 mens from Corpus Christi, it probably inhabits the whole Gulf 

 coast. 



H. uvulifera may be distinguished from H. auriculata 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 is reflected, sometimes appressed to the 

 last whirl. 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 there 

 is no groove within it on the last whirl. 



Fig. 160. 



Helix auriformis, Bland. — Shell rimately perforate, above de- 

 pressed, with rib-like striae, beneath inflated, convex, almost smooth, and 

 with microscopic spiral lines ; white, or brown horn-color, 

 thin ; spire very short ; whirls five and a half to six, rather 

 flat, the last deflected, and shortly turned outwards from 

 the preceding whirl, constricted, scarcely scrobiculate ; 

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

 Helix auriformis storne acute, continuous, the margins joined by a short 

 " [Bla.n'd.] linguiform fold, entering within the aperture ; the right 



