. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. VERTIGO. 215. Vertigo Bollesiana, Mouse. Shell minutely perforate, cylindrical-ovate, delicately striated, subtranslucent; apex obtuse; suture well defined; whorls 4, subconvex; aperture suborbicular, somewhat flattened on its outer edge; with 5 teeth, one prominent and rather curved on the pari- Fi8-12°- etal margin, two similar in form, the lower one the smaller, on the columellar margin, and two slightly elevated lamelliform teeth within and at the base; peristome subreflected and thickened. Length, .065 inch ; bre
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. VERTIGO. 215. Vertigo Bollesiana, Mouse. Shell minutely perforate, cylindrical-ovate, delicately striated, subtranslucent; apex obtuse; suture well defined; whorls 4, subconvex; aperture suborbicular, somewhat flattened on its outer edge; with 5 teeth, one prominent and rather curved on the pari- Fi8-12°- etal margin, two similar in form, the lower one the smaller, on the columellar margin, and two slightly elevated lamelliform teeth within and at the base; peristome subreflected and thickened. Length, .065 inch ; breadth, .035 inch. (Morse.) Isthmia Bollesiana, Morse, Ann. N. Y. Lye., VIII. Vertigo Bollesiana. 209, Figs. 4-6 (Nov. 1865). Vertigo Bollesiana, Morse, Amer. Nat., I. 669, Figs. 63- 64 (1868). — AV. G. Binney, L. & Sh., I. 250 (1869).—Gould and Binxky, Inv., 442, Fig. 703 (1870). — Tryox, Am. Jouin. Conch., III. Ft. 4, p. 308, PL XV. Fig. 25 (1868). New England; New York; Virginia. Distribution, therefore, like the last species. Animal unobserved. Jaw of the same width throughout, slightly rounded at the ends; cutting edge without projections, finely striated. Lingual membrane with 88 rows of (12—1—12) teeth; base of attachment notched at outer posterior corners; square, widening posteriorly, armed with three minute denticles, central one largest; laterals having two minute den- ticles apart, outer denticle nearly obsolete; marginals scarcely notched. A comparison of this description and figure of dentition with that of Lehmann (PL XIV. Fig. 53) will prove that this species cannot be identical with P. pygmcea of Europe, as has been suggested by Mr. Gwyn Jeffreys (Ann. Mag. Nat, Hist., 1872, 246). Fig. 121. Lingual membrane of Vertigo Bollesi- ana (Morse). Vertigo milium, Gould. Vol. III. PL LXXI. Fig. 1. Shell very minute, subcylindrical, diminishing equally to both extremities; epidermis dark-amber, or chestnut-color; whorls 5, rounded, very minutely stria
Size: 2002px × 1248px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorha, bookcentury1800, bookdecade1870, booksubjectzoology
