. Bulletin - United States National Museum. Science. LOCALLY INTHODl'CKD SPECIES. 467. half as loug as the base of attachment, and bearing a short, conical cut- ting point, reaching only about one-half the distance to the lower edge of the base of attachment; fig. 510. this cutting point has lateral bulgings. First laterals like the centrals, but asymmet- rical by the irregular cut- ting away of the lower inner angle of the base of attach- Lingual dentition T. hortemis. (Morse.) meut; outer laterals with a more developed cutting point and a de- cided side cusp and cutting point; the change fro
. Bulletin - United States National Museum. Science. LOCALLY INTHODl'CKD SPECIES. 467. half as loug as the base of attachment, and bearing a short, conical cut- ting point, reaching only about one-half the distance to the lower edge of the base of attachment; fig. 510. this cutting point has lateral bulgings. First laterals like the centrals, but asymmet- rical by the irregular cut- ting away of the lower inner angle of the base of attach- Lingual dentition T. hortemis. (Morse.) meut; outer laterals with a more developed cutting point and a de- cided side cusp and cutting point; the change from the laterals to the marginals is shown in the sixteenth tooth in Morse's figure in L. & W. Sh., I, in the eleventh in the membrane figured by me, where the base of attachment is wider, the reflection stouter, and the inner cut- ting point becomes bifid. The marginals are low, wide, the reflection equaling the base of attachment, the inner cutting ijoint short, bluntly bifid, the outer shorter and blunt, often bifid (Terr. Moll., V, Plate X, Fig. C). Tacliea liorteiisis, Muller. Shell imperforate, subglobose; epidermis shining, smooth, olivace- ous-yellow, and often variously ornamented with rufous ^'f- ^^1 horizontal bands or lines ; whorls5, convex; sj^ire some- what elevated ; suture, at the extremity of the last whorl, curved towards the aperture; peristome slightly reflected, white, obsolete on the base, with the margin thickened internally; aperture rounded, slightly contracted at the base by the thickening and indentation of the peristome; umbilicus covered, in- dented ; base convex. Greater diameter 20, lesser 17""; height, 12'"'". Helix hortensis, Muller, &c.—Pfeiffer, Mod. Hel. Viv., iii, 195.—Mrs. Sheppard, Tr. Lit. Hist. Soc. Quebec, i, 193 ().—Gould, Invert., 172, ed. 2, 429 (1870).—BiNNEY, Terr. Moll., li, 111, pi. viii.—W. G. Binney, Terr. Moll., iv, 51; L. «fe Sh., i, 181 (1869).—Morse, Amer. Nat., i, 1
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