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from the ocean bottom are acted upon by acid, the calcareous 
portion outside was dissolved off, and perfect casts, even in 
some cases showing the more delicate ramifications of animal 
tissue, were brought to view. Occasionally this solvent action 
had gone on as the shells lay upon their ocean bed, and he, 
Prof. E., had specimens of such beautiful green casts from the 
Gulf of Mexico. The connection of this fact with the still 
more important discovery of the Canadian geologists of the 
now well-known Hozoon Canadense, was of great interest. 
Here we have a gigantic Foramenifer, into the chambers and 
tubes of which a green mineral has been infiltrated, and by 
the action of acids, as in the case of the greensands and 
recent specimens, the most delicate organizations of these 
creatures can be shown to be preserved in durable Serpentine. 
This was of special interest at the present time, as during 
the present year a new locality for this fossil had been made 
known at one of the meetings of this Society, where it oceurs 
in vast quantities, and presenting some new features which 
will be presented in due time, as soon as they have been 
properly studied. 
The following paper was read. 
Notes on the Minerals of the Cornwall Mines, Pennsylvania. 
By Pror. D. S. Martin. 
This paper was illustrated by a full suite of the minerals 
mentioned, and will be published in the Annals of: the 
Lyceum. 
The President, Dr. J. S. NEwperry, exhibited a fine suite 
of Fossils from the Phosphatic beds of South Carolina. These 
consisted of shark’s teeth of several species; the most con- 
spicuous being those of Corodon Megalodon ; some as large as 
the hand of an average sized man; vertebree and tecth of 
Zeuglodon; ribs and vertebrae of Sgualodon Altanticus and 
others. With these, and found in the same deposit, were 
