Lithophyta, five of them having the Impression of Plants, from Mendip Cole-Pits Com. Somers. As many from those at North Byerley Com. Ebor. The Gifts of my honoured Friends Dr. Woodward and Dr. Richardson, some of which are upon Coal-Slate, others upon a harder Stone; of these are the Filix florida, sive Osmunda regalis, Filix Mas dicta, Filix Fæmina. Here is also Lh. ignota Planta Mineralis, Neurophyllon carbonarium dicta, N° 184. but from whence I remember not. But the most distinct are those in a hard Iron-stone from the Newcastle Coal-Pits, called by the Miners Cat-heads, which contain a Fern Leaf, or Polypody very fair; they are found in a particular Stratum, and being struck with a Hammer very readily part in two, and discover the Plant, which is very prominent on one Side, and concave on the other: Of these I have from two Inches to five in Length, the longer hath fifteen Leaves on each Side the middle Rib; one of them is broader and contains four Plants, resembling Lh. Trichomanes Minerale 191. Don. D. Jab. Cay M.D. But the most durable of any of these impressions is one found at Rochdale in Lanc. upon a very hard Iron Stone, whereupon are three of the said Plants very fair. Don. Gul. Clayton. Arm.