4. Pileopsis. The Caplike Limpet. Four species.

Easily distinguished by its form, which gave rise to the common name.

Shell oblique, sharp pointed; cone bent forward, with a recurved, almost

spiral summit, finely striated longitudinally and slightly wrinkled

transversely; aperture a round oval; the margin at the base nearly

round, more or less regularly crenated and indented, interior with a

lengthened, arched, transverse muscular impression.

Pileopsis ungarica.

P. mitrula.

P. intorta.

P. subrufa.

_P. ungarica._ The Fool’s Cap.

Conical, vertex slightly spiral, pointed, and recurved; exterior pale

fawn colour, and the outer margin bordered with a fringed epidermis;

interior sometimes of a very bright pink or rose colour.

A Manual of Conchology According to the System Laid Down by Lamarck, with the Late Improvements by De Blainville. Exemplified and Arranged for the Use of Students. · 第 140 / 258 题