. Bulletin - United States National Museum. Science. ^â ' ;⢠JIT. thyroides. partially covered by the reflected peristome where it unites with the base of the shell. Greater diameter 22, lesser lO^""'^; height, IS""". Helix Ihi/roiduF, Say, Nich. Encycl. (Ainer. ed,), 1H17, 1818, 1819 ; Joiirn. Phil. Acad, i, 1-23 (1817); American Concliol()f>y (), No. 2, pi. xiii ; ed. Binnky, 33, pi. xiii; ed. Chenu, Bibl., 3, 22, ])\, iii, fig. 3.âEaton, Zool. Text-Book, li)3 (1826).âFerussac, Hist., pi. xlix, a, fig. 4; pi. 1, «, fig. 6?âDeshayes, Encycl. M<^th., ii, 2
. Bulletin - United States National Museum. Science. ^â ' ;⢠JIT. thyroides. partially covered by the reflected peristome where it unites with the base of the shell. Greater diameter 22, lesser lO^""'^; height, IS""". Helix Ihi/roiduF, Say, Nich. Encycl. (Ainer. ed,), 1H17, 1818, 1819 ; Joiirn. Phil. Acad, i, 1-23 (1817); American Concliol()f>y (), No. 2, pi. xiii ; ed. Binnky, 33, pi. xiii; ed. Chenu, Bibl., 3, 22, ])\, iii, fig. 3.âEaton, Zool. Text-Book, li)3 (1826).âFerussac, Hist., pi. xlix, a, fig. 4; pi. 1, «, fig. 6?âDeshayes, Encycl. M<^th., ii, 230 (1^30); in Lam., An. sans Vert., viii, 114; ed. 3, iii, 309; in Fku., i, 209.âBinxey, Bost. Journ. Nat. Hist., i, 488, pi. xviii (1837); Terr. Moll., ii, 129, pi. xi.âLeidy, T. M. U. S., i, 257, pi. xi, figs. 7-9 (1851), anat.âr3E Kay, N. Y. Moll., 29, pi. ii, fig. 8.âGould, Invertebrata, 171, fig. 108 (1841); ed. 2, 425 (1p70).âAdams, Vermont MoUusca, 159 (1842).âMrs. Gkay, Fig. Moll. An , pi. ccxci, fig. 6, from Bost. Jouru., no descr. Helix thyruidcs, PFEirFER, Mon. Hel. Viv., i, 345; in C'liEMXiTZ, cd. 2, i, 331, pi. Iviii, figs. 8, 9 (1850).âReeve, Con. Icon., No. 077.âW. G. Bixney. Terr. Moll., iv, 53; L. & Sli., i, 147, fig. 251 (1869).âMouse, Amer. Nat., i, 98, fig. 3 (1867). Anchlsioma ihi/roides, II. & A. Adams, Gen., pi. Ixxviii, fig. 3, no descr. Mesodon ilujroidts, TuYON, Am. Journ. Concb., iii, 41 (1867). Helix hxicculenta, Gould, Proc. Bost. Soc. Nat. Hist., iii, 40 (1848); Terr. Moll., iii, 9, pi. xi, rt.âPfeiffer, Mon. Hel. Viv., iii, 271; iv, 323.âW. G. Binney, Terr. Moll., iv, 54 ; L. & Sh., i, 148, fig. 254 (1869). Helix thi/roides, (3, Pfeiffer, Mon. Hel. Viv., i, 345.âVar. F£ruS8AC, Hist.,pi. 1, a, fig. 7. Mesodon bucculcnta, Tryon, Am. Jonrn. Concb., iii, 41 (1867). Mesodon thyroides, W. G. BiNMEY, Terr. Moll., v, 330. Animal: Color a dirty yellowish-white, with a grajish hue in some individuals, eye ped
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