DESCRIPTION OF THE PLATES. 



PLATE I. 



(Plates I. to IX. inclusive are from Parkinson's Organic Remains.) 



Fossil Woods and Leaves. 



Fig. 1. Fossil coniferous wood, from a bed of clay at Blackwall. This wood is simply bitu- 

 minized, and has undergone no other mineral transmutation ; it is in the usual 

 condition of wood in peat-bogs. 



Fig. 2. A piece of bituminous wood, containing Mellite, or Honey-stone (honigstein of Werner), 

 the yellow crystallized substance in the middle of the specimen. It is a fossil resin, 

 allied to amber : from Thuringia. 



Fig. 3. Carbonized coniferous wood, from the so-called " Bovey Coal " formation of Devonshire. 



Fig, 4. A piece of calcareous wood, showing very distinctly the ligneous structure on the surface. 



Fig. 5. Lignite, or carbonized wood, in clay ; the cracks or fissures in the wood are filled up 

 with white calcareous spar. Specimens of this kind are common in many argil- 

 laceous strata, as well as in limestone. 



Fig. 6. A fragment of shale, covered with the imprints of the leaf-stalks that have been shed. 

 It is a species of Lepidodendron. See description of Plate XXVI. 



Fig. 7. This fossil vegetable is part of the stem of a tree ; and possibly of a species of Sigillaria. 



Fig. 8. Portion of a nodule of ironstone, enclosing some pinnules or leaflets of a beautiful fern 

 (Neuropteris) : from Coalbrook Dale, Shropshire. 



