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

by Paul S. Mikkelsen

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Term Definition

APERTURAL LIP, OUTER   [need definition]. See illustration: Composite Gastropod. See also: APERTURAL LIP; INNER APERTURAL LIP.
   

LIP, OUTER   The outer, distal, growing or leading edge of a gastropod shell; = LABRUM; = PERISTOME. See illustration: Composite Gastropod. See also: OUTER APERTURAL LIP; PALATAL.
   


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