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JOURNAL OF PROCEEDINGS. 23 
posit of the State geological collection, when received, in the Mu- 
seum of the Academy. Dr. Pollak see Dumas’ Traité du 
Chimie (4 vols. 8vo). 
August 11, 1856. 
The President, Dr. Gro. Encetmany, i in the chair. 
A letter was read from Prof. Joseph Hews, of the Sakianice 
Institution, in reply toa letter of the Corresponding Secretary, 
, also, letters from Prof. Joseph Leidy, of Philadelphia, and 
F. v. Hayden, M.D., elected Ceci Members. 
Dr. Pollak presented 30 species of fresh-water shells from the 
Missouri River, belonging to the genera Unio, Anodonta, and 
Alasmodonta. Dr. Shumard presented 45 species belonging to 
the same genera, from various positions in the Mississippi Valley. 
Dr. Engelmann presented specimens of the same from the Illinois 
River. : 
Dr. Pope deposited in the Museum a specimen of fossil tortoise 
( Testudo Owenii), from Nebraska, and also various Indian orna- 
ments and gre. a ~ = tapered to ‘mapa - 
