76 THE HAMILTON ASSOCIATION. 
No. 1 represents a trumpet-shaped Dictyonema. As far as 
I know it may be new to science on this continent. This may 
be said probably also of the larger one, No. 2, on page 77, 
which appears to belong to a bulbous-rooted member of the 
family. It may be noticed the connecting bars are few in the 
species. The above occur at the base of the chert beds. 
