. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 192 TERRESTRIAL AIR-BREATHING MOLLUSKS. the peristome of the shell; generative orifice behind the right eye-peduncle; no locomotive disk; no caudal mucus pore. Fig 98. Shell obsoletely rimate, calcareous, nor- mally truncated, cylindrically elongate; re- maining whorls 4-6, the upper truncated ones 8-10, the upper one globular; aperture semioval; peristome straight, thickened with- Animal of Stenogyra decollata, in, its margins connected with callus, the columellar twice as short as the external one; columella not tru
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 192 TERRESTRIAL AIR-BREATHING MOLLUSKS. the peristome of the shell; generative orifice behind the right eye-peduncle; no locomotive disk; no caudal mucus pore. Fig 98. Shell obsoletely rimate, calcareous, nor- mally truncated, cylindrically elongate; re- maining whorls 4-6, the upper truncated ones 8-10, the upper one globular; aperture semioval; peristome straight, thickened with- Animal of Stenogyra decollata, in, its margins connected with callus, the columellar twice as short as the external one; columella not truncated. Jaw and lingual membrane: see p. 191. A single species is known, which inhabits Europe. It has been introduced by commerce into Charleston, South Carolina. Stenogyra decollata, Linn. Vol. III. PI. I. Fig. 1. Shell rather thick, long, cylindrical, turreted ; epidermis shining, whitish, with a slight tint of brownish or yellowish; apex obtuse; spire gradually en- larging from the apex to the aperture, commonly abruptly truncated between the third and fifth whorls next the aperture; whorls remaining 3 to 5, flat, a little wrinkled, and in the last two or three slightly crenate, or plaited below the suture; suture not impressed ; aperture lateral, oval, angulated superiorly, its plane very nearly parallel with the axis of the shell; peristome simple, thickened within, its columellar portion reflected. Axis of the truncated shell usually about 25 mill.; diameter of the largest whorl less than 12 mill. Helix decollata, Linnjeus, Syst. Nat. 1247, etc. Bulimus dccollatus, Draparnaud, 7(3, PI. IV. Fig. 27, etc. — Pfeiffek, Mon. Hel. Yiv., IV. 4f-6. — Binney, Terr. Moll., II. 280, PI. I. Fig. 1. — W. G. Binney, Terr. Moll., IV. 131. — Leidy, T. M. U. S., I. 259, PI. XV. Figs. 5, 6 (1851), anat. Bulimus multilatus, Say, Journ. Acad. Nat. Sci. Philad., II. 373; ed. Binney, 25 (err. typ. for mutilatus). Bulimus mutilatus, DeKay, N. Y. Moll., 5G (1843). — Pfeiffer, Mon. Hel
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