An Illustrated and Cross-Referenced Glossary of Malacological and Conchological Terms

by Paul S. Mikkelsen

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Search results for:   DIRECTIVE RIB       2 terms were found.

Term	Definition

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RIB, DIRECTIVE		A rib, forming a part of surface ornament of a shell, that lies entirely within a single plane; see also: DIRECTIVE SPIRAL.

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RIB, DIRECTIVE		A RIB, forming part of surface ORNAMENTATION of shell, that lies entirely within a single plane.

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