The same name was introduced again by Blainville (1829) in his article "Thracie" of "Dictionnaire des Sciences Naturelles" (vol.

It ismarked with irregular lines of increase, entirely white, and covered with a grayish brown epidermis.

The posterior extremity is truncated : this side is bounded outwardly by a very prominent obtuse angle, which extends obliquely from the beak to the lower part of the shell.

[2] Thracia corbuloidea is found in the North Atlantic Ocean, off Spain, the Azores and the Canary Islands; also off Florida.

It is distributed widely round the coasts of Britain where it burrows in sandy or muddy substrates, extending its siphons to the surface to breathe and feed.