The Ohio ^ACaturalist, 



PUBLISHED BY 



The Biological Club of the Ohio State University, 

 Volume IV. MAY, 1904. No. 7. 



TABLE OF CONTENTS 



Hyde— Changes in the Dnii nagv Near Laucaster 149 



Claassen— List of the Mosses of Cuyahoga aud Other Counties of Northern Ohio 157 



Morse— The Breeding Habits of the Myriopod, Fontaria Indianae 161 



SCHAFFNEK — Di^eiduous 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 partiall}- worked 

 out by Prof. Tight' and Mr. L,everett.'^ 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 yet, 

 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, flow^s 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 very 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 yards in width and \-ery 

 gorge-like in character. At Sugar Grove the drift in the valley, 

 as shown bj^ 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. Bull. Denison University, No. 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. 



