The Ohio ^h(^aturalisty 



PUBIvISHED BY 



The Biological Club of the Ohio State Uni'versity. 

 Volume VII. FEBRUARY, 1907. No. 4. 



TABLE OF CONTENTS. 



Morse— The Columbus Esker 63 



Herms— Xotes ou a Sandusky Bay Shriiu]), Palaemiinetcs exilipes Stinipsoii 73 



Selby — On the Occurrence of Phytoplithora iut'estaus Mont, ami Plasniopora culiensis 



(B. & C.) Humph, in Ohio 79 



Sterki— Some Notes ou Collecting MoUusca in Ohio during V.K»'> Sfi 



Frank— ISIeeting of the Biological Club 88 



THE COLUMBUS ESKER. 



William Clifford Morse. 



Terminology. 



The terms employed in this discussion have been used in 

 various senses by different writers. Their appHcation has been 

 gradually restricted by a series of steps which the author will 

 trace at the outset. Wright (M, in his chapter on kames, says: 

 "The word 'kame' has already been defined as a local term ap- 

 plied to the sharp, gravel ridges which abound in various parts 

 of Scotland, and which in Ireland are called 'eskers', and in 

 Sweden 'osars'. As Geikie's work on 'The Great Ice Age' has 

 given currency to the Scotch name, and as the word has been 

 adopted bv those who have investigated this class of formations 

 most fully in America, it seems best to continue its use, though 

 either of the names is more euphonious." 



Wright's subsequent application of this term (kame) is to 

 North American formations, which Geikie would have, at least 

 in his third edition of "The Great Ice Age", (-') differentiated 

 as osars and kames, if not by further distinctions. The former 

 are defined by him as "ridges of gravel, etc., which coincide in 

 direction with the trend of the glaciation — they follow, in short, 

 the path of the ice sheet" ; the latter as "Kames of gravel, sand, 

 etc., which are typically developed in the Lowlands opposite 

 the mouths of mountain-valleys, and which, when followed up 

 such valleys, pass eventually into ordinary morainic accumula- 

 tions." Not only does Geikie clearly distinguish between osar or 

 esker on the one hand and kames on the other, but Chamberlin (^) 



1. Wright, G. Frederick. The Ice Age of North America, p. 297. 1S91. 



2. Geikie. Great Ice Age, Third ed., p. 205, 1894. 



3. Ibid, p. 745. 



