13 Calliostoma zizyphinum

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13 Calliostoma zizyphinum

1: anterior of foot truncated. 2: posterior of foot obtusely pointed.
3: right neck lobe, cilia on dorsal surface create exhalent current for respiratory water and faeces. Brown spots on ventral surface of neck-lobe.
4: cilia on left neck lobe create inhalent current.
Shell height 23 mm. Portland Harbour. April 2012.

Imprint

Photographic guide to the identification and biology of European marine invertebrates

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