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

by Paul S. Mikkelsen

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Term Definition

SIPHONAL CANAL   A complete or incomplete tubular shell extension through which the anterior SIPHON is extended; if protruded, this is called a ROSTRUM; = CAUDAL CANAL; = ANTERIOR CANAL. See illustration: Composite Gastropod. See also: BASAL FOLD; SPOUT.

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