. Bulletin - United States National Museum. Science. ^88 A MANUAL OF AMERICAN L\ND SHELLS. ffelix lingiiifera, Lamarck, An. s. Vert., vi, 90 (1822). — Fkuussac, Prodr., do; Hist., pi. xlix, a, fig. 3.—Deshayes, Encycl. M6th., ii, 224 (1830); in Lam., viii, 70 ; ed. 3, iii, 293.—Pfeiffer, Syinb. ad Hist. Hel , 19 (no dcscr.).—Chenu, ni. Conch., pi. xii, fig. v; pi. vii, fig. 6.—Delessert, Recueil, pi. xxvi, tig. .5(1841). Xolotrema a2)pressa, Tryon, Am. Joiirn. Conch., iii, 50 (1867). Triodopsis appresm, W. G. Binnney, Terr. Moll., v, 305. Jn Pennsylvania and New York it is not found east of th
. Bulletin - United States National Museum. Science. ^88 A MANUAL OF AMERICAN L\ND SHELLS. ffelix lingiiifera, Lamarck, An. s. Vert., vi, 90 (1822). — Fkuussac, Prodr., do; Hist., pi. xlix, a, fig. 3.—Deshayes, Encycl. M6th., ii, 224 (1830); in Lam., viii, 70 ; ed. 3, iii, 293.—Pfeiffer, Syinb. ad Hist. Hel , 19 (no dcscr.).—Chenu, ni. Conch., pi. xii, fig. v; pi. vii, fig. 6.—Delessert, Recueil, pi. xxvi, tig. .5(1841). Xolotrema a2)pressa, Tryon, Am. Joiirn. Conch., iii, 50 (1867). Triodopsis appresm, W. G. Binnney, Terr. Moll., v, 305. Jn Pennsylvania and New York it is not found east of the Appala- FiG. 307. chian Chain. From thence it ranges to Arkansas, fig. 308 and from Georgia to Illinois. It may thus be con- sidered a species of the Interior Kegion. It is best developed in Tennessee and Georijia. T. appressa, Animal resembling externally T. paUiata. var. a. Fig. 807 represents a smaller, more angular form. Fig. 308 repre- sents the var. a of Say, which has two well developed teeth on the peristome. I have received it from Virginia, Tennessee, Kentucky, Ohio, Indiana, and Illinois. The jaw is very strongly arcuate, of uniform width throughout 5 an- terior surface with 15 ribs, denticiilatiug both margins. Lingual membrane with 105 rows of 40-1-10 teeth each; another membrane (Terr. Moll., V, Plate VII, Fig. Q) had 33-1-33 teeth; about 12 perfect laterals. The fourteenth tooth has a bifid inner cutting- point. I have in my cabinet a reversed individual of var. a, found in Fig. 309. my garden, in Burlington, N. J. It is a descendant of some Illinois specimens sent me twenty-five years ago by the lamented Kennicott. The adaptation of the species to colonization is also proved by its having recently been found by Mr. J. Matthew Jones in the island of Bermuda, no doubt imported on plants. The genitalia are figured in Terr. Moll., I, Plate XI. Fig. K. The ovary is long and narrow. The epididymis is very long, convoluted at the end near the oviduct. The l
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