CLAY GENUS. SECOND S'U ; BS P E C I E S. Indurated Lithomarge, or Rockmarrow. -n.L.c -• ■' ■ —• .V [' Feftes Steinmark.—Werner. ~'.,i ’ .r.~v f v *.*- r r External Characters. ’ £ -"‘‘ ly ' L ■ *'/o. z\i- -o ?V * * **• ' 1 It is mod qpipjnonly^ white, of which it prefents- the following varieties : yeilowifh, fnow/and reddifll white; alfo pearl grey, plumb blue, lavender blue . further, flefh red and ochre yellow. The white and red are uniform, but the other co lours are‘ufually difpofed in fclouded and fpotted de lineations *. Is maffive. • Internally it is dull. Fratture large conchoidal, palling into even and fine earthy. * The Wonder earth, or terra miraculofa, which -i^a variety of this fubfpccies, is remarkable for the beauty of its colour de lineations. Streak-