PROCEEDINGS 
OF THE 
BOSTON SOCIETY OF NATURAL HISTORY. 
TAKEN FROM THE SOCIETY’S RECORDS. 
January 3, 1872. 
The President in the chair. Twenty-five persons present. 
Dr. Anton Dohrn of Jena, Dr. Armand Thielens of Tirle- 
mont, Prof. E. Van Beneden of Liege, and M. Henri de 
Saussure of Geneva, were elected Corresponding Members. 
Messrs. James F’. Pickering, Gurdon Saltonstall, Frank W. 
Stearns, George W. W. Dove, Paul 8. Yendell, David L. 
Nichols, Samuel Wells, James Boll, R. Stuart Chase, Edward 
P. Austin, Charles E. Hosmer, Alfred Bowditch, William F. 
Freeman, Theodore W. Gore, were elected Resident Mem- 
bers. 
Prof. T. Sterry Hunt made some remarks on the so-called 
Devonian and Silurian fauna, and presented from the author 
a work on the “Flora of the Eriean Division,” by Prof. Daw- 
son. 
Prof. W. H. Niles stated, that while studying the effects 
of pressure upon rocks, he had observed® certain facts con- 
nected with the metamorphism of some pebbles contained in 
the conglomerate rocks at Chestnut Hill Reservoir. 
In a collection of these pebbles which he exhibited, each specimen 
had clusters of small acicular crystals at two directly opposite points 
PROCEDINGS B. S. N. H. — VOL. XV. 1 AUGUST, 1872. 
