A treatise on malacology; or, Shells and shell fish . ; inner lip very thick, with a tumidmargin ; pillar generally with a central plait; oper-culum ear-shaped. obeliscus. En. Meth. lb. f. 5. (Aberrant.)semi-granosum. lb. 443. f. Mart. 157. f. 1483. Cerithium Lam. Channel short, nearly straight; pillarsmooth ; inner lip thickened only at the top, where En. M. 443. f. f. Lam. No. Mart. 157. f. 1481. vertagus * Connecting this with the last sub-family by means of Representing Pleurotoma. 316 SHELLS AND SHELL-FISH. PART II.
A treatise on malacology; or, Shells and shell fish . ; inner lip very thick, with a tumidmargin ; pillar generally with a central plait; oper-culum ear-shaped. obeliscus. En. Meth. lb. f. 5. (Aberrant.)semi-granosum. lb. 443. f. Mart. 157. f. 1483. Cerithium Lam. Channel short, nearly straight; pillarsmooth ; inner lip thickened only at the top, where En. M. 443. f. f. Lam. No. Mart. 157. f. 1481. vertagus * Connecting this with the last sub-family by means of Representing Pleurotoma. 316 SHELLS AND SHELL-FISH. PART II. it forms a short internal channel; operculum ear - shaped. nodulosum. En. Mdth. 442, tuberculatum. Mart. 3. f. 1490. Family 4. VOLUTID^. Shell destitute of a channel; the base truncated andnotched; the piUar marked with folds or plaits ; oper-culum none. SuB-FAM. 1. VOLUTINiE. True Volutes. Spire shorter than the aperture^ which is never striated;pillar with distinct plaits^ the upper ones the shortest;tip of the spire papillary.* {fig. 81.). Voluta Linn. Shell large, ventricose ; the spire ex-tremely short, very obtuse, and papillary ; the ter-minal whorls, where they exist, being smooth Turbinelliform type. Shell melon-shaped; spire very * Except in Volutiliihes, •which wants the three last characters, — faint, the tip of the spire acute, and the lower plaits the longest. PART II. VOLUTINS. 317 short, sometimes nearlyobsolete. {Jig- 81. 6.) diadema. En. M. 388. f. 2. armata. lb. 388. f. 1. tessellata. Mart. f. 781. ^thiopica. En. M. 388. f. 3. melo. lb. 389. f. 1. Neptmii. lb. 386. f. 1. Cymbium. lb. f. 3. proboscidalis. lb. 389. f. 2. Olla. lb. 385. f. 2. rubiginosa. Ex. Conch. 28. porcina. En. M. 386. f. 2. 2. Muriciform type. Shellheavy, less ventricose, co-ronated with cylindricalor vaulted spines; spiremore produced. marmorata. Ex. Conch, pi. lb. pi. En. Meth. 3. Strombiform type. Outerli
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectmollusks, bookyear184
