A treatise on malacology; or, Shells and shell fish . ed; outer lip,and often the inner, very much thickened and inflexed,with the inner margin tcrenated; pillar with distinctplaits ; the base with a wdde, but not a deeply cleftnotch. VoLUTELLA Sw, BulHform ; ovate oblong;spire either entirely or almost concealed ;pillar with four oblique plaits at thebase ; aperture not striated; outer lipsmooth, thickened; inner lip w^anting. {fig- m V. bullata. Chemn. f. , Zool. 111. ii. pi. 44. f. 1guttata. lb. £ 2. Persicola Schiim. General form of Volutella; butthe spire always conce
A treatise on malacology; or, Shells and shell fish . ed; outer lip,and often the inner, very much thickened and inflexed,with the inner margin tcrenated; pillar with distinctplaits ; the base with a wdde, but not a deeply cleftnotch. VoLUTELLA Sw, BulHform ; ovate oblong;spire either entirely or almost concealed ;pillar with four oblique plaits at thebase ; aperture not striated; outer lipsmooth, thickened; inner lip w^anting. {fig- m V. bullata. Chemn. f. , Zool. 111. ii. pi. 44. f. 1guttata. lb. £ 2. Persicola Schiim. General form of Volutella; butthe spire always concealed ; plaitsnumerous,and extending nearly over the whole of thepillar; the aperture striated; inner lip thickened, spreading. avellana. En. M. 377. f. 5. lineata. Sw. lb. f. 3. f. 4. {fig. 90.) GibberULA Sw. Sub-oval; spire slightly prominent;top of the outer lip dilated and gibbous ; base of theinner lip with plaits ; inner lip broad, zonata. En. Meth. 374. f. 6. Marginella Lam. Oval; spire slightly prominent ; Y 2.
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectmollusks, bookyear184
