. Bulletin - United States National Museum. Science. UNIVERSALLY DISTRIBUTKD SPECIES. 71 epidermis is the same iu both. The luster of the epidermis resembles that of satin. It has been suggested that striatella is identical with H. omphalos, Searles Wood, an Eocene fossil of Headon Hill, Isle of Wight. OTEICROPIIYSA. (See below.) Mici'ophysa pyg:nisea, Drap. Shell umbilicated, subglobose, reddish horn-color, ^ig. 31. shining, marked with strong transverse strife and micro- scopic revolving lines, both most prominent near the um- bilicus ; whorls 4, convex, gradually increasing, the last broadl
. Bulletin - United States National Museum. Science. UNIVERSALLY DISTRIBUTKD SPECIES. 71 epidermis is the same iu both. The luster of the epidermis resembles that of satin. It has been suggested that striatella is identical with H. omphalos, Searles Wood, an Eocene fossil of Headon Hill, Isle of Wight. OTEICROPIIYSA. (See below.) Mici'ophysa pyg:nisea, Drap. Shell umbilicated, subglobose, reddish horn-color, ^ig. 31. shining, marked with strong transverse strife and micro- scopic revolving lines, both most prominent near the um- bilicus ; whorls 4, convex, gradually increasing, the last broadly umbilicated; aperture subcircular, oblique; peristome simjile, acute, its columellar extremity subre- flected. Greater , l^'"™; height, 1'^^°'. Helix pygviwa, Drap., &c. Helix viinutissima, Lea, Trans. Am. Phil. Soc, ix, 17; Proc, ii, 82 (1841); Obs., iv, 17 (1848).—Troschel, Arch. f. Nat., 1843, ii, 124.—Pfeiffer, Mod. Hel. Viv., i, 87.—W. G. BiNNEY, Terr. Moll., iv, 100, pi. Ixxvii, figs. 6, 7.—Morse, Am. Nat., i, 546, fig. 46 (1867). Helix minuscula, teste Binney, Terr. Moll., ii, 221. Punctum minutissiinum, Morse, Jouru. Portl. Soc, i, 27, figs. 69, 70, pi. viii, fig. 71 (1864).—AV. G. Bixney, L. & Sb., i, 222 (1869); T. M , v., 411. Conulus minutissima, Tryon, Am. Journ. Concb., ii, 257 (1866). Hyalina minutissima, Gould and Binney, Iuv. of Mass. (2), 403 (1870). Maine, Massachusetts, New York, Ohio, Bosque County, Texas, in the Eastern Province; San Francisco, Lone Mountain, California, iu Pa- cific Province. Probably will be found over all the continent. In North- ern and Central Europe it has also an extensive range. I repeat below the complete history of the species as given bj' Bland (Ann. Lye. Nat. Hist, of N. Y., X. 306). This species was described as Helix minutissima by Dr. Lea iu 1841. In 1864 Professor Morse thus described its jaw : "The buccal plate is made up of sixteen long, slender, corneous laminae, recurved
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