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, 

 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 uvulifcra, SHUTTLEWORTH, Bern. Mitt., 1852, 199.- enlarged' 



CHEMNITZ, ed. 2, II. 420, PI. CXLVIII. Figs. 19, 20(1853). 

 -GOULD, Terr. Moll., III. 20. W. G. BINNEY, Terr. Moll., IV. 75 ; L. & 

 Fr.-W. Sh., I. 87 (1869). PFEIFFER, Mon. Hel. Viv., III. 267. BLAND, 

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



Helix fiorulifera, REEVE, Con. Icon., No. 699 (Aug. 1852). 



Helix auriculata, minor, FERUSSAC, Hist., PI. 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. 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 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 

 Animal of 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. auriculata. 



Polygyra auriformis, BLAND. 



Shell rimatcly perforate, above depressed, with rib-like stria;, 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 lU, lesser 

 10 mill.; height, 6 mill. 



