Old-fashioned spelling of gastropod.
- The horny operculum with which the periwinkle, like other gasteropods, closes its shell had effectively kept out the anemone's digestive enzymes.
- The next closest occurrences of this gasteropod are in the Alps of Central Europe and east of the Urals in Siberia.
- Calcareous plate used to covering the shell mouth of gasteropod molluscs; protective plate covering the gills in fishes.
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