140 



York, January 15, 1857; the Royal Institution, Novem- 

 ber 26, 1856, acknowledging the receipt of the Proceed- 

 ings of the Society; from the Societe Imperiale d' Agri- 

 culture, &c., de Lyon, July 9, 1856, the Societe Lin- 

 n^ene de Lyon, July 9, 1856, the Academic Imperiale 

 &c., de Lyon, July 14, 1856, the Acadejnie Royale des 

 Sciences de Stockholm, August 1, 1856, presenting 

 their various publications ; from Dr. John S. Newberry, 

 Washington, Dec. 22, 1856, acknowledging -the receipt 

 of his diploma as Corresponding Member; from Robert 

 Kennicott, Esq., West Northfield, Illinois, January 15, 

 1857, acknowledging the donation of the Journal ; from 

 Isaac Lea, Philadelphia, January 2, 1857, and M. L. A- 

 Huguet Latour, Montreal, Jan. 3, 1857, requesting that 

 missing numbers of the Proceedings may be sent to them ; 

 from William Stimpson, Washington, Jan. 2d, 26th, and 

 29th, concerning his papers on the Crustacea of Califor- 

 nia ; froni Charles Girard, New York, Jan. 19, con- 

 cerning his descriptions of new California fishes : from 

 Charles Whittlesey, Cleveland, Ohio, Jan. 25, accom- 

 panying a geological paper, 



Mr. Leander Wetherell was elected a Resident Mem- 

 ber. 



February 18, 1857. 

 Dr. C. T. Jackson, Vice-President, in the Chair. 

 Prof..H. D. Rogers read the following paper entitled, — 



CLASSIFICATION OF THE METAMORPHIC STRATA OF THE AT- 

 LANTIC SLOPE OF THE MIDDLE AND SOUTHERN STATES. 



The following is a concise sketch of the Geological composi- 

 tion of the Atlantic Slope of the Middle and Southern States, 



