volvaria

from The Century Dictionary.

• noun A genus of tectibranchiate gastropods, of the family Actæonidæ, represented by extinct Tertiary shells, as V. bulloϊdes: formerly including certain smooth shells of the family Marginellidæ. See cut under volutite.
• noun [Fries, 1821.] A genus of central-stiped, rosy-spored agarics having the pileus at first inclosed in a membranous veil which ruptures and remains as a volva at the base of the stem. Over 30 species have been described. V. volvacea, having an ash-colored pileus streaked with black fibrils, is found in Europe, Ceylon, and North America.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun agarics having pink spores and a distinct volva