pentine were well known to me; and when Dr. Carpenter dis- 
covered the tubulation of the cell-wallin the specimens from 
Petite Nation, I compared this structure with that of these veins, 
and satisfied myself of its distinctness before acceding to his con- 
clusions on this point. 
It would also appear that the radiating and sheaf-like bundle 
of crystals of tremolite, or similar prismatic minerals, whic 
represented by substances so diverse as serpentit’y 
limestone, and carbonaceous matter. This is intellt 
