Elements of conchology Prepared Elements of conchology / Prepared for the use of schools and colleges elementsofconcho00rusc Year: 1844 Fig. 39.—TROCHUS AGGLUTINANS. u Fig. 37. SOLARIUM PERSPECTIVUM. Fig. 38. lutions or whorls of the spire are marked by a crenulated cord, that is, notched on the edge {fig. 38). 30, Among the Trochi properly so called, with ' an umbilicated shell, we will men- tion the Trochus agglutinans, which is found in the West Indies and Pacific. It has the singular faculty of glueing to itself movable bodies found on the ground on which it rests ; sometimes it glues st
Elements of conchology Prepared Elements of conchology / Prepared for the use of schools and colleges elementsofconcho00rusc Year: 1844 Fig. 39.—TROCHUS AGGLUTINANS. u Fig. 37. SOLARIUM PERSPECTIVUM. Fig. 38. lutions or whorls of the spire are marked by a crenulated cord, that is, notched on the edge {fig. 38). 30, Among the Trochi properly so called, with ' an umbilicated shell, we will men- tion the Trochus agglutinans, which is found in the West Indies and Pacific. It has the singular faculty of glueing to itself movable bodies found on the ground on which it rests ; sometimes it glues stones and sometimes shells or pieces of shells, according to the place where it is found. From this habit of building out its habita- tion from materials not its own, it is sometimes called the Ma- son {Fig. 39). There are some without an umbilicus, very conical, and very tall, that are marked by numerous whorls in the spire, with crossing strise; the ex- tremity of the columella is much twisted, and projects be- yond the origin of the lip. A specimen of this variety is seen in the annexed figure of the telescope trochus {Fig. 40).
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