. Bulletin - United States National Museum. Science. EASTERN PKOVINC: INTERIOR REGION SPECIES. 289 Tri4>«loi>»js BBiAccta, Say. Shell with the umbilicus closed, depressed; epidermis brownish horu- color, with very fiue, hair like projections; whorls fig. 310/ 5, with very minute transverse striie; suture not much impressed; aperture three-lobed, very much contracted; peristome white, narrow, reflected, with a deep groove or indentation behind the re- HeUx injiccta. flection, contracting the opening- so that the outer edge of the peristome does not project beyond the surface of the whorl;
. Bulletin - United States National Museum. Science. EASTERN PKOVINC: INTERIOR REGION SPECIES. 289 Tri4>«loi>»js BBiAccta, Say. Shell with the umbilicus closed, depressed; epidermis brownish horu- color, with very fiue, hair like projections; whorls fig. 310/ 5, with very minute transverse striie; suture not much impressed; aperture three-lobed, very much contracted; peristome white, narrow, reflected, with a deep groove or indentation behind the re- HeUx injiccta. flection, contracting the opening- so that the outer edge of the peristome does not project beyond the surface of the whorl; on the inner margiu of the peristome are two acute teeth with the points directed inwards, one near the base, the other midway between that and the junction of the peristome with the body-whorl, with a circular sinus between them, forming one of the lobes of the aperture; parietal wall with a long, aicnated, white tooth; umbilicus covered, its place considerably im- ])rossed. Greater diameter 12, lesser 11"""; height, 6§™". Jlelix wfltcta, Say, Joiirn. Phila. Acad., ii, 153 (1821); ed. Binney, 16.—Bixney, Bost. Joni'ii. Nat. Hist., iii, 358, pi. ix, fig. 1 (1840) ; Terr. Moll., ii, 143, pi. xlv, figs. 2, 3.—Die Kay, N. Y. Moll., 45 (1843).—Mrs. Gray', Fig. Moll. An., pi. cxciii, fig. 7 (ex Bost. Joiirn., uo descr.)—W. G. Binxey', Terr. Moll., iv, 5'J; L. & Sb., i, 128, fig. 216 (1869).—Bland, Ann. N. Y. Lye, vii, 425. —Pfeiffer, Mou. He). Viv., iv, 319. Hdix clausa, Feruss vC, Tab. , 38, No. 104; Hist., pi. Ii, fig. 2.—Deshayes, Eucycl. Metb., ii, 252 (1830) ; in Lamarck, viii, 114; ed. 3, iii, 309; io Fer., i, 143. —Pfkiffer, Mon. Hel. Viv., i, 420; in Chemnitz, ed. 2, i, 368, t. Ixiv, figs. 25, 26.—Rkeve, Cou. Icon., No. 704 (1852). Xoh)tre)na claiiiia, Rafinksque, Eunuieratiou, &c., 3 (1831); ed. Binney and Tryun, Isofj 110)11 ostoiiia injlcrlii, Tkyox, Am. Journ. Concb., iii, 54 (1867). 'J'riodopgiis bijlccUi,
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