EASTERN PKOVIiNCE SOUTHERN REGION SPECIES. 383 



sac's species, and though uot referred to iu his description, is distinctly 

 shown iu one of the figuies ; it is entirely wanting iu leporina, and 

 also in pustuloides. This groove is not only an external character, but 

 its presence modifies the internal structure of the shell. On openiug 

 the base of the last whorl, immediately behind the aperture, a strongly 

 developed transverse tubercle is seen within, from which a strong, ridge- 

 like lamella runs round the umbilical opening, corresponding in extent 

 with the groove. This tubercle, and fhe extension of it, are entirely 

 disconnected by a sinus or channel from the tioor of the penult whorl. 



The hirsute character of this species is not generally alluded to by 

 authors. The outer edge of the peristome in specimens from Saint Au- 

 gustine is of a deep rose-color. 



Jaw as usual ; 14 crowded ribs. 



P.pustula (Terr. Moll., V, Plate VI, Fig. E) has 17-1-17 teeth on its 

 lingual membrane, with 8 laterals. 



Polj Syra piistuloitles, Bland. 



Shell widely umbilicate, planorboid, thin, rufous or pale horn-colored, 

 delicately striated, with thin, sparingly hirsute epidermis; spire scarcely 

 elevated ; whorls 4 to 4^, slightly convex, gradually in- 

 creasing, the last subangular at the periphery, at the 

 aperture gibbous, constricted, suddenly deflected, be- 

 neath devious ; suture rather deeply impressed ; umbili- 

 cus wide, equal to one-third of the larger diameter of the 

 shell, showing all, but especially the penult whorl; 

 aperture with an internal, fulcrum-like process on the 



I', pustuloides. 



base of the shell, oblique, crescentic, with an erect, ob- 

 lique, white, parietal, lamelliform tooth, joined to the upper angle of the 

 aperture by a slightly arcuate, filiform callus ; peristome reflected, with 

 margins approaching, and having two dentiform lobes, separated by a 

 deep fissure. Greater diameter 5^, lesser 4^"'"^ ; height, 2.V"'". 



Helix pusi Ilia, Binney, Terr. Moll., ii, 201, pi. xxxix, fig. 3, not of Fekussac. 



Helix 2}ustuloides, Bland, Anu. N. Y. Lyc.,vi, 350, fig. 3 (1658).— W. G. Binney, Terr. 



Moll., iv, 93; L. «fe Fr.-W. Sh., i, 110 (1869). 

 DcedalocMla pustuloides, Tryon, Am. Journ. Conch., iii, 61 (1867). 

 Foh/gyra jmstuloides, W. G. Binney, Terr, Moll., v, 287. • 



Georgia, Alabama, and Tennessee. A species of the Southern Re- 

 gion. 



F. pustuloides is intermediate in size hetw tien jfustula and leporina — 



' The figure does not show the hirsute epirlermis of the shell. 



