EASTERN PKOVINCE INTERIOR REGION SPECIES. 263 



distance back of the aperture. It inliabits crevices in the slates of 

 the Ocoee District, where I have found it at the localities above men- 

 tioned. The genitalia of this species, of the H. Uneatus, Z. suhplanus, P. 

 Bryant i, and other rare shells of this region will form the subject of a 

 future paper. 



The above is Wetherby's description. A figure of his type is also 

 given. 



STROBIL.A, Morse. 



Animal as in Patula. 



Shell umbilicated, globose-conic or depressed, obliquely and coarsely 

 striated, smoother below; whorls 5 or 6, the last riG.279. 



globose; aperture lunately rounded; peristome 

 thickened, reflected ; the parietal wall and base of 

 the last whorl each with two or more entering re- 

 volving laminae. 



An American genus ; one of its species, however, 



. Animal of iS. labyrinthica. 



IS also louud in Jamaica. (Morse.) 



Jaw low, wide, slightly arcuate, ends scarcely attenuated, blunt; 

 cutting margin without median projection; riG.28o. 



anterior surface with (over twelve in lahy- 

 rinthica, numerous in Huhbardi) crowded 

 ribs,^denticulating either margin, and more 

 developed on the center of the jaw. Jaw ofs. labyrMhica. 



Lingual membrane of labyrinthica as usual in Helicidw, long niid nar- 

 row, with 78 rows of 13-1-13 teeth each, with 5 perfect laterals. Morse 

 figures 6 laterals. Centrals with a base of attachment about square, 

 ui^per edge broadly reflected; reflection very short, bearing a long, 

 slender, median cusp, reaching the lower edge of the base of attach- 

 ment, with a short cutting jioint extending slightly beyond it; side 

 cusps very small, each bearing a short cutting point. Lateral teeth 

 like the centrals, but asymmetrical by the suppression of the inner 

 lower angle of the base of attachment and the inner side cusp and 

 side cutting i)oiut. Outer lateials gradually changing into the mar- 

 ginals, which are low, wide, with a reflection equaling the base of 

 attachment, and furnished with numerous (about five) subequal, short 

 cutting points, the inner one longest and bifid (Terr. Moll., V, Plate V, 

 Fig. O). 



Morse mentions no ribs on the anterior surface of the jaw, but they 

 are well (leveloped on the specimen examined by me. 



