In some of the large stems the lig- neous fibre remains perfect and distinct : these are often mineralized by sulphate of barytes, or calca- reous spar; they resemble rotten ash, and split length- wise very readily.

There is still another variety of large fossil trees in which the whole of the trunk has been changed into a compact lignite : the original bark now appears in coal, and when removed from the fossil, the tree resembles a peeled oak.

" Stifmaria are very numerous; and they are fre- quently found with their leaves attached and ex- tending in all direction from their trunk into the shales and Hund-i.

III Lepidodetulra, cuUnnittm, siiillaria, ustfi-nfiliyUitfii, Pecopterit loiichitica, and other well-known IbiwiU, are abundant.

The hem-nth the coal are rooHt frequently lnad-- itli xfiiinun-in, as observed by Mr K.