vG! 
October 27th, 1873. 
President Newberry in the chair; nine persons present. 
Dr. FEUCHTWANGER showed a large series of fossils ob- 
tained by him during the summer, from the ‘“‘ Upper Mar! 
Bed ” (Eocene), at Deal, N. J., five miles below Long Branch. 
Dr. R. P. Stevens described, and drew, a remarkable 
silicified skull of some marine animal, which he had lately 
seen in Accomac Co., Virginia. 
THE PRESIDENT identified it as the skull of a walrus 
(Trichecus rosmarus). Several simular walrus skulls have 
been found on the coast within some years past, and likewise 
in the old shell-heaps. They are of glacial age, and possess 
much interest; as the species does not now occur south of 
Nova Scotia. 
Pror. D. 8. Martin exhibited a set of specimens of coral, 
of several species, altered to chalcedony, from Tampa Bay, 
Florida. Prof. Dana, in his Mineralogy, (Ed. 1868, page 
196) refers to such a coral-pseudomorph, from Devonshire, as 
having been described as a separate variety of chalcedony, 
under the name of Beckite. 
THE PRESIDENT referred to the vast amounts of chaleedony 
in the far West, amounting, at some points in southern Cali- 
fornia, to thousands of tons. There, as doubtless also local- 
ly at Tampa, it is the product of thermal waters which have 
taken up silica, and which, in the far West, are connected 
with the great volcanic disturbances that have taken place. 
Dr. R. P. STEVENS read the following paper: 
Recent Observations on Drift. 
In some late geological excursions in the south and south- 
west, I have-observed indications which carry the limit of 
glacial action further south than I had previously supposed. 
In the Potomac valley, drift deposits are apparent: at 
Cumberland, Md., they rival those of any northern river 
