LAURENTIAN LIFE 



121 



to bear on these old rocks, and are connected with 

 the reputations of several eminent men, now de- 

 ceased, we may first refer shortly to the history 

 of the discovery of supposed fossils in the Lauren- 

 tian rocks of Canada. 



Fig. 25. — Nature-print of an eUJied Specimen of Eozoon. 



Showing the laminae, a part of the natural margin, near which passes a diagonal 

 calcite vein, and at the upper right-hand corner, fragmental material with casts of 

 Archaeospherinae. The dark lines represent the chambers filled with serpentine, the 

 white the calcite wall. 



