03 Tritia incrassata

03 Tritia incrassata

Each whorl of the spire has 12 to 15 strong costal ribs, and the body-whorl has 10 to 13 including the one next to the lip which is expanded into a wide, labial varix (1).
H. 11 mm, Menai Strait, Wales, February 2013.
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Sets of OTHER SPECIES:
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