197 
March 20th, 1871. 
The President in the chair. T'wenty-two persons present. 
Mr. E. GUILLAUDEU presented some specimens of Fossils 
from the Greensand of New Jersey, found at Tinton Falls. 
These were a fragment of Ammonites placenta, a scute of 
an extinct crocodile, a bone probably of a turtle and others. 
This last mentioned was of special interest, as the bony 
matter has been replaced by Vivianite. 
Dr. L. FeucHTWANGER exhibited specimens of Pumice in 
the form of fine glassy threads, and commonly known as 
Pele’s Hair from the volcano of Kilauea, in the Sandwich 
Islands—Pele being the goddess of this voleanic mountain. 
It is formed by the winds acting upon the liquid lava-jets, 
and is often thickly strewn over the ground on the leeward 
side of the mountain. Many of the filaments, when examined 
by means of a lens, are seen to have little knobs of volcanic 
glass at one end, precisely like those drawn off from the 
molten mass of a glass furnace, or formed by heating a 
filament of ordinary glass in a spirit-lamp flame. He also 
exhibited specimens of a mineral consisting of Chloride of 
Silver and Copper, from the White Pine district in Nevada; 
also fossils from the same locality. These consist of Carbonif- 
erous and Silurian mollusks, (Productus cora, Rhynchonella 
increbescens, &c., and crinoidal columns,) the last found in a 
siliceous limestone almost like the Buhrstone of West 
Virginia. 
THE PRESIDENT, Dr. J. S. NEWBERRY exhibited a series 
of Drawings of Fossil Fishes, prepared for the State Geological 
Survey of Ohio, for the most part by Mr. G. K. Gilbert, and 
described the peculiarities of the species illustrated. 
Pror. C. A. SEELEY exhibited a specimen of a White 
Pulverulent Mineral, from St. Lawrence county, New York, 
