. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 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
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 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; enlarsed- L. & 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 12 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 whol
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