CONTEMPORAKIES AND SUCCESSORS OF EOZOON. 137 



their pores filled with calcite, so as to present a homo- 

 geneous appearance. Others have much the appear- 

 ance of fragments of such Primordial forms as ArcJiceo- 

 cyatlms, to be described in the sequel ; but after much 

 careful search, I have thus far been unable to say more 

 than I could say in 1865. 



+ SO 

 FIG. 32. Archceospherince from St. Pierre. 



(1.) Specimens dissolved out by acid. The lower one showing interior septa. 

 (&.) Specimens seen in section. 



FIG. 33. ArcTiceospherincB from Burgess Eozoon. 

 Magnified. 



It is different, however, with the round cells infil- 

 trated with serpentine and with the silicious grains 

 included in the loganite. I have already referred to 



