. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 156 TERRESTRIAL AIR-BREATHING MOLLUSKS. in the dentition by which to distinguish it from many of the othd- American genera of disintegrated Ilelix, as will be seen below. It will be noticed that one species, asteriscus, has marginal teeth like those of Pupa and Vertigo. Patula solitaria, Say. Vol. III. PL XXIV. Shell broadly umbilicated, globosely depressed, coarse, solid, diaphanous, ob- liquely and erowdedly wrinkled, from white to dark reddish horn-color with from two to three brownish revolving bands ; whorls 6, c
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 156 TERRESTRIAL AIR-BREATHING MOLLUSKS. in the dentition by which to distinguish it from many of the othd- American genera of disintegrated Ilelix, as will be seen below. It will be noticed that one species, asteriscus, has marginal teeth like those of Pupa and Vertigo. Patula solitaria, Say. Vol. III. PL XXIV. Shell broadly umbilicated, globosely depressed, coarse, solid, diaphanous, ob- liquely and erowdedly wrinkled, from white to dark reddish horn-color with from two to three brownish revolving bands ; whorls 6, convex ; suture deep ; aperture roundedly lunate, pearly white and banded within ; peristome simple, acute, its ends joined by a thin transparent callus, that of the columella dilated, subreflected. Greater diameter 25, lesser 22 mill.; height, 15 mill. Helix solitaria, Say, Journ. Phila. Acad., II. 15? (1821); Binney's ed. 19.— , N. Y. Moll. 43, PI. III. Fig. 41 (1843). — Binney, Bost. Journ. Nat. Hist., III. 426, PL XXII. (1840) ; Terr. Moll., II. 208, PI. XXIV.— Chemnitz, 2d ed., 1. ISO, PL XXIV. Figs. 5, 6.— Pfeiffer, Symbol*., II. 39; Mon. Hel. Viv., I. 102. —Reeve, Con. Icon., 662(1S52). — W. G. Binney, Terr. Moll., IV. 96. — Leipy, T. M. U. S., I. 254, PL VIII. Figs. 7-10 (1851), anat. — W. G. Binney, L. k Sh., I. 71, Fig. 119 (1869). Anguispira solitaria, Tkyon, Am. Journ. Conch., II. 260 (1866). Microscopic revolving lines have been detected on some specimens. There is a form of a dark reddish-brown color, with one white band at the periphery, and the same color at the base around the umbilicus. Al- F'g- 63. bino forms are also found (see Fig. 63). The Museum of Comparative Zoology has a reversed specimen. A Post-pleiocene species now very common in the Inte- rior Region, especially in the parts north of the Ohio River. I have never received it south of Missouri. It has ranged Var. Albino. widely westward, having been found in the Cceur d'Al
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