THE PRESERVATION OF EOZOON. 



107 



and essential. In illustration of tliis, I may refer to the 

 highly magnified canals in figs. 28 and 29. Further^ 

 it is evident from the examination of the specimens, 

 that the chrysotile veins, penetrating as they often do 



Fig. 23. Cists of Canals of Eozoon in Serpentine, decalcified and 



highly magnified. 



Fig. 29. Canals of Eozoon. 

 Highly magnified. 



diagonally or transversely across both chambers and 

 walls, must have originated subsequently to the origin 

 and hardening of the rock and its fossils, and result 

 from aqueous deposition of fibrous serpentine in cracks 

 which traverse alike the fossils and their matrix. In 



