(Montagu, 1803)
Description (shell):
Adult shell curved, glossy, without annulations; apex sealed by a dome-shaped calcareous plug (C. glabrum-drawing).
Size:
Up to 2.5 x 0.5 mm.
Colour:
White; operculum yellow.
Animal:
Body as in Caecum trachea : snout flat, deeply bifid; cephalic tentacles long, with setose tips. No pallial tentacles.
Operculum convex.
Habitat:
Habitat as for Caecum trachea : sublittoral, on sand and sandy-mud, to 250 m.
Distribution:
Distributed from Mediterranean to Norway and west coast of Sweden (Distr. C. glabrum). Common, but inconspicuous.