27 
A. Associated remains of Dznzchthys, Newb. The heavy 
head and shoulder armoring of this specially predatory 
form. Examples attained a length of fifteen feet. 
The hinder trunk region was enclosed in leather-like 
integument. Recently mounted in the Geological 
Museum of Columbia College. 
B. Remains of a kindred lung fish, J/y/ostoma, from the 
same horizon. The slabs exhibit the head and body 
armoring, together with mouth-parts. This specimen 
is the only remains extant of this pavement-toothed 
form of ‘‘ placoderm.” 
C. A newly discovered fossil lung fish from near Linton, 
Ohio. This form is entirely different in a number of 
points of structure from kindred forms. Its dentition 
approaches most nearly that of 7vachosteus. 
Recently presented to the Geological Museum of 
Columbia College, by Mr. F. A. Schermerhorn. Ex- 
hibited with reconstructions by Dr. Bashford Dean. 
DEPARTMENT OF GEOLOGY. 
In charge of Prof. James F. Kemp. 
133) SERIES OF TWENTY-FIVE SPECIMENS ILLUSTRATING THE 
GEOLOGY OF THE ADIRONDACKS. The specimens show the 
lowest gneisses and magnetite; the over-lying crystalline 
limestones and ophicalcites; the later intruded, igneous an- 
orthosites, gabbros, norites and titaniferous magnetites; the 
Potsdam sandstone, Calciferous, Chazy and Trenton limestones 
with fossils; the Champlain clays, recent molluscs and glaci- 
ally striated rocks. Under microscopes are shown thin 
sections of the crystalline rocks. 
34. SERIES OF ABOUT TWENTY SPECIMENS ILLUSTRATING 
THE GEOLOGY AND ORES OF FRANKLIN FURNACE AND 
OGDENSBURGH, N. J., as described by J. F. Kemp in the 
Transactions of the Academy for November, 1893. 
135. ORBICULAR GRANITE from Quonochontogue Beach, R. L., 
described by J. F. Kemp, in the Transactions for Feb. 19, 
1894. 
