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(Montagu, 1803)

Description (shell):
Adult shell curved, glossy, without annulations; apex sealed by a dome-shaped calcareous plug (C. glabrum-drawing).

Up to 2.5 x 0.5 mm.

White; operculum yellow.

Body as in Caecum trachea : snout flat, deeply bifid; cephalic tentacles long, with setose tips. No pallial tentacles.
Operculum convex.

Habitat as for Caecum trachea : sublittoral, on sand and sandy-mud, to 250 m.

Distributed from Mediterranean to Norway and west coast of Sweden (Distr. C. glabrum). Common, but inconspicuous.

Caecum glabrum