STENOTREMA. 295 



tongue-shaped tooth, which extends nearly across the whole width of the aper- 

 ture ; peristome callous, margins slightly but distinctly re- 

 flected, and thickened within ; basal margin slightly arcuate, 

 but entire ; with an internal transverse tubercle at the base of 

 the shell. Greater diameter 10, lesser 9 mill. ; height, 6 mill. 

 Helix barbigera, Redfield, Ann. N. Y. Lye, VI. 171, PI. IX- 



Figs. 4, 5, 7 (1856). — Gould in Terr. Moll., III. 21.— s. barb,gerum, 

 W. G. Binney, Terr. Moll., IV. 63, PI. LXXVII. Fig. 2; enlar s ed - 



L. & Fr.-W. Sh., I. 116 (1869). — Pfeiffer, Mon. Hel. Viv., IV. 343. 

 Stenotrema barbigera, Tryon, Am. Journ. Conch., III. 60 (1867). 



A species of the Cumberland Subregion, ranging into North Carolina, Geor- 

 gia (Habersham County), and Alabama. 



Smaller and more delicate than 5. spinosum ; stria? more numerous, thickly 

 set with fine cilia, which project at the periphery in a fine fringe, and not like 

 short triangular aculei, as in spinosum. The umbilical region is less depressed, 

 the parietal tooth much more delicate, and does not overlap the peristome 

 which stands off from the shell, and is not appressed to it. S. Edgarianurn is 

 much more solid and elevated, has the parietal tooth more developed, the peri- 

 stome notched, as in .S'. hirsutum, but has about the same diameter. 



Jaw, as usual, with 1 2 crowded ribs. 



Lingual membrane (PI. ATI. Fig. C) has 21—1—21 teeth; 8 perfect lat- 

 erals ; but even the third has its inner cutting point greatly produced. 



Genitalia as in <S. stenotremum. 



Stenotrema stenotremum, F£k. 

 Vol. III. PI. XLII. Fig. 4. 



Shell imperforate, globose, diaphanous, reddish, hirsute, convex above, in- 

 flated below ; spire elevated ; whorls 5, somewhat convex, the last anteriorly 

 gibbous, angularly deflected ; aperture irregularly transversely lunar, almost 

 linear, contracted by a long, stout, elevated, lamelliform tooth along the whole 

 length of the parietal wall, furnished far within on the base of the last whorl 

 with a transverse, tubercle, springing from the axis ; peristome scarcely ex- 

 panded above, thickened by a heavy, regularly curving callus, its basal margin 

 with a small notch. Greater diameter 10, lesser 9 mill. ; height, 6 mill. 



Helix stenotrema, Ferussac in Mus. teste Pfeiffer, Synib., II. 39, excl. j^u^ula. 

 — Reeve, Con. Icon., 702. — W. G. Binney, Terr. Moll., IV. 61 ; L. k Fr.- 

 W. Sh., I. 117 (1869). — Bland, Ann. N. Y. Lye, VII. 327. 



Helix hirsuta, var. a, Ferussac, Hist. , PI. L. a, Fig. 3. — /3. Pfeiffer, Mon. 

 Hel. Viv., I. 421 ; in Chemnitz, ed. 2, I. 376 (1846), PI. LXV. Figs. 12-14 

 (1849), var. stenotrema. — Var. Binney, Terr. Moll., II. 151, PI. XLII. Fig. 

 4. — Deshayes in Fer., I. 140. 



Stenotrema convcxa, Rafinesque, Enum. and Ace, 3 (1831) ; Binney and Tryon 

 ed., 28. 



Stenotrema stenotrema, Tryon, Am. Journ. Conch., III. 56 (1S67). 



