The Ohio ^J^atiiralist, 
PUBLISHED BY 
The Biological Club of the Ohio State Uni-versity. 
Volume IV. MAY, 1904. No. 7. 
TABLE OF CONTENTS 
Hyde— Changes in the Drainage Xoar Lancaster. U9 
ri.AASSEN — List of the Jlosses of Cnyahoga and Other Counties of Xorthern Ohio 1.37 
Morse — The Bree<ling Habits of the Myriopod, Pontaria Indianae 161 
SciiAFi'NER — Deciduous Leaves 163- 
CHANGES IN THE DRAINAGE NEAR LANCASTER. 
Jesse E. Hyde. 
The drainage changes in the headwaters of the Hocking River, 
caused by the ice of the Glacial epoch, have been partialh- worked 
out by Prof. Tight' and Mr. Leverett.'^ Their investigations 
relate to the changes in the river itself, to those tributaries lying 
to the east and to Clear Creek on the west. To the writer’s 
knowledge, those changes which occurred in the region just west 
of the Hocking and between it and Clear Creek have not, as j'et, 
been worked out. However, a brief review of the entire region 
may not be lacking in interest nor out of place. The writer 
wishes here to express his indebtedness to Prof. J. A. Bownocker 
for suggestions and criticisms in the preparation of this paper. 
The Hocking River rises on the upland in the southeastern 
part of Bloom township, Fairfield county, flows eastward and 
enters its valley proper in the southern part of Greenfield town- 
ship near Hooker. At Hooker its valley has a breadth of about 
two miles, but it is not ver}' deep or well defined. At Lancaster 
it is more than a mile wide, but the rock hills on either side rise 
more abruptly and to a greater height, making the valley more 
conspicuous. Continuing down the stream, it narrows until at 
Sugar Grove it is not more than one-half mile wide, and just 
above Logan it is onh’ a few hundred j-ards in width and very 
gorge-like in character. At Sugar Grove the drift in the valley, 
as shown by gas borings, is about loo feet deep, at Lancaster 200 
feet and at Carroll, eight miles above Lancaster, 260 feet. The 
elevation of Carroll above sea level is 835 feet, that of Lancaster 
831 feet and Sugar Grove 769 feet." This makes the rock floor 
1. Hull. Denison University, Xo. IX, p. 33. 
2. Glacial Formations and Drainage Features of the Erie and Ohio Basins, pp. 169-172, 
3. Geol. Sur. of Ohio, Vol. 6, p. 802. 
