PALEONTOLOGY. 

 PLATE I. 



Page. 

 Paljjophycus, sp. ? 333 



Fig. 1. View of a fragment of sandstone having its surface covered with the disjointed 

 stems. 



Pal^ochorda prima 331 



Fig. 2. View representing the surface of a fragment of sandy shale, with several specimens 

 of the species. 



Pal^eophycus occidentalis 332 



Fig. 3. View of a slab of sandstone, which is covered with stems of the ordinary form 

 and size, some of which show the mode of bifurcation. 



