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An Illustrated and Cross-Referenced Glossary of Malacological and Conchological Terms |
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| by Paul S. Mikkelsen | |||
| Term | Definition |
| OPISTHOBRANCH | Marine Mollusks which are characterised by having a single gill behind and to the right of the heart; they also have a reduced or absent shell and always lack an OPERCULUM. Included in this group are the BUBBLE SHELLS, the NUDIBRANCHS, SEA HARES and SEA BUTTERFLIES. | |
| Copyright ©Paul S. Mikkelsen, All Rights Reserved | Return to Home Page | Return to Top | Over 1700 Terms in the Glossary! |