196 FLINT GENUS. Fragments indeterminately angular and pretty ffiarp edged. It fometimes occurs in lamellar diftintt concretions. It is more or lefs tran flu cent, and pafies into tranf- lucent on the edges. Hard. Brittle. Difficultly frangible. Not particularly heavy. • Geognostic Situation. It occurs in beds in tranfition mountains, and pro* bably alfo in fome floetz formations. Geographic Situation. It is found in .Saxony, Ilarz, and in various parts of the great traft of tranfition rocks in the fouth of Scotland, as at Lead Hills, Carlips, and Moorfoot Hills, near Edinburgh. SECOND
