Shell ventricose,with elongated aperture, and short spire; proboscis and siphon long;operculum with marginal nucleus. [Please select]
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Campanulate: bell-shaped: more or less ventricose at the base and a little recurved at the margin. [Please select]
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I have another specimen which agrees tolerably with Lister's figure in being more than usually ventricose, and which I think is accidental. [Please select]
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--Head and body, about 22 inches; tail, 20 to 22; skull of one 4-1/5 inches, less ventricose than that of _P. [Please select]
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_ Shell ventricose, the base lengthened; aperture longer than broad; outer lip slightly emarginate. [Please select]
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The body whorl is more or less ventricose; the outer lip is a little reflected, and the whole shell, when full grown, much thicker and heavier than any of the other species. [Please select]
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