Plasma. 189 Obfervation. Werner is of opinion that it is an intimate combi nation of chalcedony with green earth. TWENTY-SEVENTH SPECIES. Plafma. Plafma.—Werner. , \ Id. Emm. b. 3. f. 322. Id. Brocb. t. 1. p. 278. External Charaders. Its moll common colour is intermediate between S r afs and leek green, and of different degrees of ‘ntenfity; fometimes it approaches to mountain 8 r een. It i s marked with ochre yellow dots and ' v hitifh fpots. The white fpots are very character!flic this fpecies. Occurs in indeterminately angular pieces, which av e a rough earthy cruft. Internally