A treatise on malacology; or, Shells and shell fish . hell small, depressed, neritiform,nearly round; inner lip forming a vitreous, spreadingmass ; no internal canal or tubercle on the innerlip; basal notch nearly obsolete ; outer lip smooth,entire, thickened. C. neritea. Ency. M. 394. f. 9. Sow. Gen. f. 3. SuB-FAM. 4. PURPURIN^.Oval; spire much shorter than the aperture, which is verywide ; inner lip not defined, but vitreous ; pillar broadand flattened ; outer lip rarely thickened or inflexed, RiciNULA Lam. {fig. 71. rf.) Outer lip dilated, and often forming digitated processes externally, b
A treatise on malacology; or, Shells and shell fish . hell small, depressed, neritiform,nearly round; inner lip forming a vitreous, spreadingmass ; no internal canal or tubercle on the innerlip; basal notch nearly obsolete ; outer lip smooth,entire, thickened. C. neritea. Ency. M. 394. f. 9. Sow. Gen. f. 3. SuB-FAM. 4. PURPURIN^.Oval; spire much shorter than the aperture, which is verywide ; inner lip not defined, but vitreous ; pillar broadand flattened ; outer lip rarely thickened or inflexed, RiciNULA Lam. {fig. 71. rf.) Outer lip dilated, and often forming digitated processes externally, but the margin broad, much reflected, and toothed internally ; inner lip flat, broad, generally toothed ; spire very small. \ planospira. En. M. digitata. Sow. Gen. f. 3, Sow. Gen. f, 1. morus. lb. f. 2. * The fanciful and inapplicable name of Cyclops, given to this type byDe Moiitford, designates a well-known genus of Crustacea.+ Except in those species, like R. ?»iunis, which lead to Purpura. PART II. PURPURIN^. •BUGGING. 301. CoNCHOLEPAS Lam. Patelliform; spire lateral, nearly-obsolete; pillar none. C. Peruviana. Sow. Gen. {fig- 71. a.) MoNCGEROs Lam. Spire moderate; a strong tooth-like process^at the base of the outer lip. (^fig. 6^.) M. imbricatum. Sow. Gen. f. lb. fisr. 4. MicROTOJiA Sw. Pillar very broad andcurving inwards ; aperture effuse;the notch at the base small^ and nearly-obsolete ; spire very short. patula. Mart. 69. f. 758, 759. persica. En. Meth. 397. f. 1. unicolor 5u\ Cheni. f. 1449. Purpura Lam. Spire more prominent;inner lip flattened; the basal notchwide and distinct.* {fig- 10, 11. h.) coronata. En. Meth. 397. f. lb. 398. f. 1. SuB-FAM. 5. always as long as the aperture, and
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectmollusks, bookyear184
