Shell pyramidical, each volution, reckoning from the base, gradually diminishing and forming a conic spire, basal volution depressed, margin of the outer lip reflected and entire.
Specific Character.
Shell trochiform, smooth, generally banded with reddish and yellowish bands: volutious convex.
Trochus Pileus. Chemnetz. Pl. 122. f. 1046-7-8.
Helix pileus. Dillwyn. p. 933. No. 106.
Lister. Tab. 14. f. 11.
In Mus. Nost.
Although this shell, in artificial arrangements, may be very well placed among the sub-divisions of Helix or Bulimus, we feel persuaded that it is, naturally, the type of a Sub-genus: we have no hesitation, therefore, in recording it as such. Another species, sharply carinated, semi-transparent, and of a milky whiteness, we discovered in Brazil: and we are thus led to conclude that the habitat of Geotrochus pileus, which no author has yet mentioned, may probably be Tropical America.