. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 378 TERRESTRIAL AIR-BREATHING MOLLUSKS. â where the base of attachment is wider, the reflection stouter, and the inner cutting point becomes bifid. The marginals are low, wide, the reflection equalling the base of attachment, the inner cutting point short, bluntly bifid, the outer shorter and blunt, often bifid (PL X. Fig. C). Tachea hortensis, Muller. Vol. III. PI. VIII. Shell imperforate, subglobose; epidermis shining, smooth, oblivaeeous-yel- low, and often variously ornamented with rufous horizontal bands or lines
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 378 TERRESTRIAL AIR-BREATHING MOLLUSKS. â where the base of attachment is wider, the reflection stouter, and the inner cutting point becomes bifid. The marginals are low, wide, the reflection equalling the base of attachment, the inner cutting point short, bluntly bifid, the outer shorter and blunt, often bifid (PL X. Fig. C). Tachea hortensis, Muller. Vol. III. PI. VIII. Shell imperforate, subglobose; epidermis shining, smooth, oblivaeeous-yel- low, and often variously ornamented with rufous horizontal bands or lines; whorls 5, convex; spire somewhat 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 T. hortensis. and indentation of the peristome; umbilicus covered, in- dented ; base convex. Greater diameter 20, lesser 17 mill.; height, 12 mill. Helix hortensis, Muller, etc. â Pfeiffer, Mon. Hel. Viv., III. 195. â Mrs. Sheppard, Tt. Lit. Hist. Soc, Quebec, I. 193 (1829). â Gould, Invert., 172, ed. 2, 429 (1870). â Binney, Terr. Moll., II. Ill, PI. VIII. â W. G. Binney, Terr. Moll., IV. 51 ; L. & Sh., I. 181 (1869). â Morse, Amer. Nat, I. 186, Fig. 16 (1867). Helix subglobosa, Binney (formerly), Bost. Journ. Nat. Hist., I. 485, PL XVI. (1837). â DeKay, N. Y. Moll., 33, PI. II. Fig. 14 ; PL III. Fig. 39. Tachea hortensis, Morse, Journ. Portl. Soc., I. 10, Fig. 11 ; PL IV. Fig. 12 (1864). â Tryon, Am. Journ. Conch., II. 321 (1866). An European species, introduced by commerce (?) to the northeastern por- tion of North America. It is found on islands along the coast from Newfound- land to Cape Cod, and on the mainland plentifully in Gaspe-, C. E.; also along the St. Lawrence; Vermont (?), Connecticut (?), etc. It also inhabits Green- land and Iceland (see Mdrch, Am. Journ. Conch.,
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