. Bulletin - United States National Museum. Science. EASTERN PROVINCE INTERIOR REGION SPECIES. 213 Jaw as usual in the genus. Z. dcmissus (Terr. Moll., V, Plate II, Fig. O) has 45-1-45 teeth, with 15 laterals. My specimen was one of the large East fig. 224. Tennessee form, called Z. acerrus by Dr. Lewis (Proc. Ac. N. Sc. Phila., 1872, 110). The typical form, from near Mobile, has, however, a perfectly similar dentition. The genitalia are like those of Z. intcrtcxti(s, Binney, ^- acerms. figured by Dr. Leidy in Terr. Moll., I. The accessory glands of the dart sac are rather shorter in demisum.
. Bulletin - United States National Museum. Science. EASTERN PROVINCE INTERIOR REGION SPECIES. 213 Jaw as usual in the genus. Z. dcmissus (Terr. Moll., V, Plate II, Fig. O) has 45-1-45 teeth, with 15 laterals. My specimen was one of the large East fig. 224. Tennessee form, called Z. acerrus by Dr. Lewis (Proc. Ac. N. Sc. Phila., 1872, 110). The typical form, from near Mobile, has, however, a perfectly similar dentition. The genitalia are like those of Z. intcrtcxti(s, Binney, ^- acerms. figured by Dr. Leidy in Terr. Moll., I. The accessory glands of the dart sac are rather shorter in demisum. The large form referred to as Z. acerrus nbove is here figured. Its greater diameter is 20™"; height, S""". It has over 7 whorls. From mountains of Eastern Tennessee and North Carolina. (Fig. 224.) Zonites lig^erus, Say. Shell perforated, orbicularly convex; epidermis yellowish horn-color, shining; whorls 7, finely and thickly striated transversely, fig. 225. smooth below; suture not much impressed; aperture semi- ,/^ lunate, rounded; peristome thin, acute; base and side of the outer whorl, within the aperture, thickened and white; perforation very small; umbilical region impressed. Greater ^- Hgerus. diameter 15, lesser IS""" ; height, 10"'"'. Helix ligera, Say, Journ. Acad., ii, 157(1821); Binney's ed., 19.—Binney, Bost. Jonru. Nat. Hist., iii, 412, pi. xx, fig. 1 (1840); Terr. Moll., ii, 204, pi. xxxv (1851).—Leidy, T. M. U. S., i, 257, pi. xii, figs. 4-7 (1851), anat.—DE Kay, N. Y. Moll., 40, excl. fig. ? (1843).—Chemnitz, ed. 2, i, 108, pi. xxxiii, figs. 5-7.—Desha YES, in Fer., i, 184.—Pfeiffer, Mon. Hel. Viv., i, 48.—Reeve, Con. Icon., 493 (1852).—W. G. Binney, Terr. Moll., iv, 95 .—Lewis, Am. Journ. Conch., vi, 190, pi. xii, figs. 3, 4. ReUx Fafiiiesquea, Fi^russac, Tab. Syst., 50; Hist., pi. Ii, a, fig. 5; pi. 1, a, figs. 4, 5? —Pfkiffer, Symb., i, 39. Helix Wardiana, Lea, Trans. Am. Phil., vi, 67, pi.
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