Easily distinguished by the numerous small valves situated at the base.
Pollicipes cornucopia.
P. mitella.
P. scalpellum.
_P. cornucopia._ The Cornucopia Pollicipes. Pl. 4, fig. 6.
Peduncle covered with imbricated scales, the lower ones rounded and
turned upward.
_P. mitella._ The Mitre Pollicipes. Pl. 4, fig. 4.
Valves indefinite in number, from six to twenty-four; almost equal, and
open like tulips; colour bluish, purplish, brownish, or reddish cast.