68 Review of the New York Geological Reports. 
An elegant form of fucoid allied to that characterizing the 
Caudi-galli grit, appears in this group. It is known as the ec 
tain-shaped fucoid. Here also is the firstyevidence of terrestrial 
vegetation. Vanuxem gives the figure of a specimen found in 
his district, (p. 127,) and another on p. 161; they are not referred 
to any known plant. : 
ur- 
Fig. 8a, b, Delthyris medialis. 9. Young shell of the same species? 10a, b. Delthyris fimbriata. 
Hall’s Report, p. 208. 
PS 
Amongst the most numerous corals of the Hamilton group, - 
the following have been selected as presenting some of the most 
on forms. 
_ The shell and coralline beds of the Falls of the Ohio and its 
ity furnish examples of a coral like fig. 3, though for the 
most part, in glomerate masses. The fossil to which we have 
