202 TRANSACTIONS OF THE [APR. 24 



" Geological History of New York Island and Harbor." J. S. New- 

 berry, (Pop. Sci. Montli. xiii., 641-660.) 



" Geologj' of the Sea Bottom in the Approaches to New York Bay." 

 A. Lindenkohl. (Am. Journal. Sci. xxix., 475-480.) 



" Notes on the Sub-Marine Channel of the Hudson Kiver and Other 

 Evidences of Post-Glacial Subsidence of tlie Middle Atlantic Coast 

 Kegion." A. Lindenkohl. (Am. Journ. Sci. xli., 4S9-409.) 



"On the Post-Glacial History of the Hudson River Valley." F. J. 

 H. Merrill. (Am. Journ. Sci. xli., 460-466.) 



•' Kecent Fossils near Boston." Warren Upham. (Am. Journ. Sci. 

 xliii., 201-209.) 



NOTE. 



[Since completing this paper my attention has been called to two 

 articles, to which, in closing, I shall take the liberty of referring.] 



In a pamphlet of 18 pages, entitled "The Geological Formation of 

 Long Island, New York, with a Description of its Old Water Courses," 

 written by John Bryson and published in 1885, the author discusses the 

 origin of the stratified and superficial deposits of the island, and amongst 

 his conclusions, arrived at from a study of these deposits, are the 

 following : 



" At the close of the glacial age, the island was doubtless connected 

 with the mainland, and that this state of things existed until the East 

 River channel was formed ; this had the effect of draining the old sub- 

 glacial streams. 



"There is no evidence of any oscillation of any part of the island 

 subsequent to the glacial age, the formation, in general, remaining very 

 much the same as it came from the hand of the glacier." 



The second contribution, from the same author, may be found in the 

 American Geologist, xi., 210-212 (March, 1893), where he notes the appa- 

 rent unity of conditions on Long Island and Martha's Vineyard, reaching 

 similar conclusions to those here advanced, but reasoning from different 

 premises. 



CHARTS AND MAPS USED. 



U. S. Coast Survey Chart, No. VII. Cape Ann to Gay Head. 



U. S. Coast Survey Chart, No. VIII. Gay Head to Cape Henlopen. 



Map of Long Island and southeastern New England, by the writer. 



