MAR 23 190P 
The Ohio turn list, 
PUBLISHED BY 
The Biological Club of the Ohio State University. 
LIBRAR'i 
NEW YORK 
BOTANICAL 
garden. 
Volume VIII. MARCH. 1908. 
No. 5. 
TABLE OF CONTENTS 
Stauffer— The Devonian Section on the Ten Mile Creek, Lucas County, Ohio.271 
Griggs—O n the Cytology of Synchytrium ..277 
Hink.—D eath of Prof. W. A. Kellerman. . .. 286 
Hubbard— Two Notable Landslides. ..287 
Osborn —Occurrence of Typhlopsylla octactanus in Ohio_ ..... _ 269 
Hine—N ote on the American Barn Owl. ..290 
THE DEVONIAN SECTION ON TEN MILE CREEK, LUCAS 
COUNTY, OHIO. 
Clinton R. Stauffer. 
The Devonian formations of Ohio are fairly well known in 
those portions of the state where they constitute the bed rock. 
This is especially true in the central strip of outcrop where the 
shales and limestones of this System sometimes form cliffs fifty 
to seventy-five feet high. In northwestern Ohio, however, the 
land lies but little above drainiage level and the covering of 
drift is frequently so deep that the streams do not cut through it. 
Hence our knowledge of most of the Devonian formations in this 
portion of the state is limited to a few outcrops with incomplete 
and more or less unsatisfactory sections. 
In this northwestern area, the Columbus limestone 1 is exten¬ 
sively quarried at White House and oecasionallv, on a much 
smaller scale, at a number of other places. The Delaware lime¬ 
stone forms only occasional and meagre outcrops, while the 
Olentangy shale is either entirely wanting or is inseparable from 
the other Erian formation. The Ohio shale outcrops at several 
(1) Ohio Classification of the Devonian and extreme upper portion 
of the Silurian as approved by Dr. Charles S Prosser 
Chautauquan ) ( Cleveland sh. 
Devonian 
Silurian 
and 
Senecan 
Erian 
Ulsterian 
Cayugan 
()hio shale 
Chagrin form. 
Huron sh. 
f Olentangy shale 
! Delaware limestone 
Columbus limestone 
UNCONFORMITY 
| Lucas Is. 
Monroe form, i Sylvania ss. 
I Tvmochtee form. 
