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.
9. Cineras. One species.
Shell composed of five testaceous oblong valves, separate, not covering the whole of the body; two at the sides of the aperture, the others on the back; peduncle of a greenish colour, with six longitudinal stripes.
C. vittata. The filleted Cineras.
Answers to the above description.