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

by Paul S. Mikkelsen

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Term Definition

COLL.   An abbreviation for the latin, Collegit, meaning: Collected by. However, this abbreviation is also interpreted as: In the collection of. Because of this ambiguity, the use of LEG. is preferred over COLL.

COLLABRAL   Parallel or nearly so. See also: COLLABRAL LINES.

COLLABRAL LINES   A series of similar, adjacent lines. See also: GROWTH LINE.

COLLAR   A raised rim bordering a suture. In cephalopods, the free edge of the mantle in squids, etc., at the "neck."

DECOLLATE   Cut off; TRUNCATED, e.g., the top several whorls of the spire (as in Truncatella spp.); typically, the loss of this portion of the shell is by design, rather than wear or corrosion; see: CORRODED.

SAND COLLAR   The egg mass of the MOON SNAIL. A circular ring, with a larger diameter at the base, of ribbonlike material composed of hardened mucous, sand and egg capsules of the Moon Snail.

SHELL COLLECTION   An accumulation of molluscan shells. This collection can vary from a basket of shells to a massive amount of shells, all of which are (typically) cataloged with a taxonomic name and (more importantly) collection data. Professional collections are maintained at a variety of museums, for example the United States National Museum (USNM), Philadelphia Academy of Natural Sciences (ANS), etc. Many "shell collections" are better classified as mollusc collections because they contain the preserved shelless molluscs as well. Often the professional collections are repository sites for TYPE SPECIMENS. Some "shell" collections (or sub-collections) may be entirely of a variety of OPERCULA.

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