THE TERTIARY AND PLEISTOCENE FORAMINIFERA 

 OF THE MIDDLE ATLANTIC SLOPE. 



BY 



R. M. Bagg, Jr. 



■:0:- 



Prefatory Note. 



The investigations carried on in the preparation of this re- 

 port have yielded fifty-six different species of Foraminifera. 

 Twenty-five of these are from the Eocene, thirty-four are from 

 the Miocene while the Pleistocene has furnished only four. In 

 the above list are included a number of species which have been 

 identified in greensand samples from deep artesian well borings 

 made recently at Norfolk, Virginia, and at Crisfield, Mary- 

 land. Most of the species from these borings are undoubt- 

 edly from beds of Miocene age but some may belong to some 

 other horizon. The Eocene specimens were nearly all obtained 

 by the writer from the greensand marls of the Pamunkey river 

 and Woodstock, Virginia, though a few were obtained at Marl- 

 boro, Maryland. 



With the exception of Cydammina placenta Reuss, which 

 came from New Jerse}' the Miocene forms came from the clas- 

 sic localities of Yorktown and James river, Virginia, and from 

 St. Mary's, Plum Point and Jones Wharf, Maryland. 



The author is under obligation to Mr. Lewis Woolman of 

 Philadelphia for the material from the artesian well at Crisfield 

 and to Mr. N. H. Darton of the United States Geological Sur- 

 vey for the samples from Norfolk. Prof. W. B. Clark kind- 

 b' gave me the interesting specimens of Cydammina from New 

 Jersey. 



