
          2 miles long & 28 feet thick, 10 feet of which
consist of the fossil infusoria alone, & the remaining
18 feet of [crossed out: ?] infusoria & fossil pollen!
The species is named by Ehrenburg Campylodiscus clypea.
Prof. Bailey has also received the same [added: & others] from Mr.
Queckett of London & will probably give
you an account of them.

Mr. Prosla is working at another Carb. Acid
apparatus & when it is finished you
shall have an opportunity of seeing
it used if you happen to be in New York
about the time it is ready.

Yours very truly
John Torrey

        