Walker & Boutall SCt
Grenville Series on the Ottawa River (17 miles to an inch).
From Logan's Original Map of 1865.
THE CHAIN OF LIFE TRACED BACKWARD
IN GEOLOGICAL TIME
GEOLOGICAL CHRONOLOGY OF LIFE.
After Prof. C. A. White.
See [transcription] below.
Note.—It is not supposed that the Geological Periods were of equal lengths, as represented in the diagram.
ERRATA.
Where Cryptozoon prolificum occurs in the text, read Cryptozoon proliferum.