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
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
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