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Corresponding Secretary, 

 Samuel L. Abbot, M. D. 



Recording Secretary, 

 Benjamin S. Shaw, M. D. 



Treasurer, 

 Nathaniel B. Shurtleff, M. D. 



Librarian, 

 Charles K. Dillaway. 



Curators, 



Thomas T, Bouve, Of Geology. 



Francis Alger, Mineralogy. 



Jeffries Wyman, M. D. Comparative Anatomy. 



Silas Durkee, M. D. Ichthyology. 



Charles J. Sprague, Botany. 



Thomas M. Brewer, M. D. Oology. 



Henry Bryant, M. D. Ornithology, 



Thomas J. Whittemore, Conchology. 



J. Nelson Borland, M. D. Herpetology. 



John P. Reynolds, M. D. Crustacea and Radiata. 



H. K. Oliver, Jr., M. D. Entomology. 



Cabinet Keeper, 

 Charles Stodder. 



Prof. William B. Rogers communicated the discovery, in a 

 new locality in Virginia, of the so-called Posidonomya, which he 

 has previously found at various points in the Mesozoic Rocks of 

 Pennsylvania, Virginia, and North Carolina. The fossils occur 

 at a point one mile due west of the junction of the Bannister and 

 Dan Rivers, near the Southern limit of the State, associated with 

 carbonaceous shales, impure coal, and sandstones. Prof. Rogers 

 stated that he had long been aware of the existence, in this vicinity, 

 of sedimentary rocks, probably belonging to the period of the Ches- 

 terfield and Prince Edward strata, regarded by him as of Jurassic 

 age, but until lately he had not been able to procure fossil evi- 



