EXPLANATION OP PLATE XXV. 



Blechnoxylon talbragarense, Eth. fil. 

 Fig. 5. An internode, partly in the round and partly as an impression, 

 and two nodes, the latter with fronds attached in a greater or 

 less degree. In the centre of the internode is a small protuber- 

 ance that may be the base of attachment of an adventitious 

 root. The fronds on the right have been pressed back out of 

 the normal position, and all have suffered from the disintegra- 

 tion of their parts by weathering. One of those on the left 

 has been so much decomposed that only the outline remains, 

 with the revolute margin subdivided by the impressions of 

 the veinules ; x 3i. 



