. Bulletin - United States National Museum. Science. EASTERN PROVINCE—NORTHERN REGION SPECIES. 191 Verti§^o Bolleslaiia* Morse. Shell minutely perforate, cylindrical-ovate, delicately striated, sub- translucent; apex obtuse; suture well defined; fig. 193. whorls 4, subconvex; aperture suborbicular, somewhat flattened on its outer edge, with 5 teeth, one prominent and rather curved on the parietal margin, two similar in form, the lower "S^M^'^ 0 one the smaller, on the columellar margin, and rcrtigo Boiusiana. two slightly elevated lamelliform teeth within and at the base; peri- stome subr
. Bulletin - United States National Museum. Science. EASTERN PROVINCE—NORTHERN REGION SPECIES. 191 Verti§^o Bolleslaiia* Morse. Shell minutely perforate, cylindrical-ovate, delicately striated, sub- translucent; apex obtuse; suture well defined; fig. 193. whorls 4, subconvex; aperture suborbicular, somewhat flattened on its outer edge, with 5 teeth, one prominent and rather curved on the parietal margin, two similar in form, the lower "S^M^'^ 0 one the smaller, on the columellar margin, and rcrtigo Boiusiana. two slightly elevated lamelliform teeth within and at the base; peri- stome subreflected and thickened. Length, .065 inch; breadth, .035 inch. (Morse.) Islhmia Bollesiana, Morse, Ann. N. Y. Lyc.,viii, 209, figs. 4-6 (Nov., 1865). Vertigo BoUeaiana, Morse, Araer. Nat., i, 669, figs. 63, 64 (1868).—W. G. Binney, L. & Sh., i, 250 (1869); Terr. Moll., v.—Gould and Binney, Inv.,442, fig. 703 (1870).—Tryon, Am. Journ. Couch., ill, pt. 4, 308, pi. xv, fig. 25 (1868). New England; New York;. Virginia. Distribution, therefore, like the last species. Animal unobserved. Jaw of the same width throughout, slightlj' rounded at the ends; cutting edge without projection, finely striated. Lingual membrane with 88 rows of (12-1-12) teeth; base of attach- ment notched at outer posterior corners; fi,;. 194. square, widening posteriorly, armed with ^r=a'^'*"* three minute denticles, central one largest; /^-^^^-^ Lingual membrane of Vertigo laterals having two minute denticles apart, BoiUsiana. (Morse.) outer denticle nearly obsolete; marginals scarcely notched. A comparison of this description and figure of dentition with that of Lehmann (Plate XIY, Fig. 53) will prove that this species cannot be identical with P. pygmcea, of Europe, as has been suggested by Mr. Gwyn Jefireys (Ann. Mag. Nat. Hist., 1872, 246). Vertigo simplex, Gould. Shell minute, cylindrical, obtuse at apex, smooth, chestnut-color; whorls 5, well rounded, separated by a deep suture; a
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