98 CLEIOCKINUS. 



above mentioned, which evidently occurred in a fine grained shale, 

 softer than the included fossils ; while in this the enclosing matrix 

 is harder, and not readily removable without carrying the surface 

 of the fossil with it (PL I., Fig. 11). 



F. A large stem, thirty inches long, with the root attached. It was found 



in the same quarry with specimen E, and there is good reason to be- 

 lieve belonged to it; but a portion of the stem at the proximal end 

 is missing, probably amounting to five or six inches. 



G. Part of another still larger stem, similar to F (PI. I., Fig. 12). 



