Professor Blumenbach, of Gottingen, in a letter to Von Moll,
says, that though he had hitherto disbelieved the occurrence of
vegetable bodies in the dendritic variety of chalcedony named
mocha stone, he must now admit that it does sometimes contain
true vegetables, apparently of the nature of conferva . He
observed these in specimens from Iceland and Catherinenburg.
The same celebrated zoologist received from Dr. Lichtenstein,
the traveller, a very remarkable agate, which was worn as a
precious amulet by a Japanese prince. On examining it, he dis-
covered in its interior the fructification of an unknown plant,
somewhat resembling the sparganium erectum .