• ( 341 ) ' ■ -ncj I hd-7’': /v .s ■- : T W E N T Y-S E C O N'D SPECIES. .t ... . v '• r .0 .0:. ■ h' L,ir - • .. ■; .'»■ Mica or Glimmer. . • • * ! *** *i. . . " * < ' J Glimmer.—Werner. • • •J;jxdr ^lica. Wall. t. i. p. 383—Glimmer, Wid. p. 403—Mica, X^Kitnu. yoi, p. 2to.—Cjr!infi;ner, Edner, b. 2. f. 673. Id Emm■ b. 1 f. j . Id- Lam p. 337-—Mica, l\ap. t>.'; *JV-*7Mtc^> Brocb. t. 1. p. 40a. "*•' ' '■ b \ 1 . External Characters. T 1 : Its mod common colour is grey, from which it P a Gts on the one fide into brown, on the other into black. Of grey it prefenis the following' varieties, ycllowifh, afh, and greenhh grey, which latt?r paifes mt0 blackifh green ; the yellowifh grey pafi'es on the °‘her fide into filver wh : te, and into pinchbeck brown an d browniih black. O.curs inafltve difieinir.atev, in thin tables and •'yers in other tto'ics, alio cryflallizcd. *» In equilaural fix fidcd tjbhs, with fmooth terminal and lateral planes. Y y a. In