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3o3 CLAY GENUS. FOURTH SUBSPECIES, Variegated Clay. Bunterthon.—Werner. External Characters. -White, red, and yellow are its chief colours. Of ‘' white, the only variety is. yellowilh white, which pafles into ochre yellow, and fometiines into yellow- , ; 3 ifh brown. The varieties of red are, reddifh white* which pafles into pearl grey, flefh red, and peach blol- fom red. It is marked with ftriped, veined, and fpotted deli neations. Occurs maflive- Fra&ure earthy, and then it has no luftre; fonts- times has a tendency to flaty, then it is glimmering. Its ftreak is Alining. Very foft, puffing into friable. I Feels a hole greaiy. Adheres a little to the tongue. Mild.* Light, pafllng into not particularly heavy. i. "'T 7