THE PRESERVATION OF lOZOON. 



Ill 



(&g. 30) presents a clavate form, as if it had been a 

 detached individual supported on one end at the bottom 

 of the sea. It shows,, as does also the original Calumet 

 specimen, the septa approaching each other and coal- 

 escing at the margin of the form, where there were 



Fig. 30. Eozoon from Tudor. 



Two-thirds natural size, (a.) Tubuli. (b.) Canals. Magnified. 



a and b from another specimen. 



probably orifices communicating with the exterior. 

 Other specimens of fragmental Eozoon from the Petite 

 Nation localities have their canals filled with dolomite, 

 which probably penetrated them after they were 



