Trans. N. V. Ac. Sct. 34 Dec. 10, 
2. Spiraxis Randalli, n. sp. 
Body fusiform ; three or four inches in length, by six to eight lines 
in diameter; surface marked by two revolving and closely approxi- 
mated ridges, which below are broad and flattened or rounded, and 
separated by narrow furrows, above acute and narrow, and separated 
by greater intervals. 
From S. major this species may be distinguished by its smaller size, 
its somewhat curved or sinuous outline, and the closer approximation 
of the raised ridges, which are also more flattened and relatively 
broader. 
December to, 1883. 
SECTION OF GEOLOGY. 
The President, Dr. J. S. NEWBERRY, in the Chair. 
One hundred and forty five persons were present. 
The PRESIDENT exhibited fine specimens of terminated crystals 
of black tourmaline from Jefferson, St. Lawrence County, N. Y., 
somewhat similar to those which are found at Monroe, Conn.; 
also some large specimens of moss agate from Brazil, and re- 
marked on their mode of formation. The resignation of Dr, 
Hiccins, from resident membership, was read and accepted. 
Dr. J. S. Newserry and Prof. H. L. FarrcuILp then presented 
a joint paper, illustrated with a large series of original lantern 
views and by specimens, on 
THE GEOLOGY, BOTANY, AND SCENERY OF THE YELLOWSTONE 
NATIONAL PARK. 
December 17, 1883. 
SECTION OF CHEMISTRY. 
The President, Dr. J. S. NEwBERRY, in the Chair. 
Sixteen persons present. 
Dr. NEWBERRY exhibited a specimen of fossil fish from Wyoming, 
presenting an interesting character of dentition; also a series of 
maps of the surveys of the route of the Northern Pacific Railroad. 
The following papers were then read by Prof. ALBERT R. 
LEEDS : 
I. THe LITERATURE OF OZONE AND PEROXIDE OF HyDROGEN 
(second memoir), published in the Annals, vol, IIJ., and including— 
1. Historical-critical resumé of the progress of discovery since 
1879. 
