H. arctica. 5mm long juvenile. Silky white shell, fine concentric ridges. Trapezoidal outline. 2 ribs with uneroded spines radiate from beak to posterior. Foot tip extended at narrow rounded anterior. Siphon tips protruded from broad subtruncate posterior

Submitted by Ian Smith on Fri, 18/11/2011 20:27
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I.F. Smith
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