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PROCEEDINGS OF THE 



[May, 1857. 



Essex Institute, Salem, Mass. Proceedings, vol. i. 1848, 

 1856. 



Boston Society of Natural History. Proceedings, February, 

 1857, pp. 81 to 96. 



American Philosophical Society, vol. vi. No. 56, 1856. 



Correspondents Elected. 



Prof. Karl Theodore Von Siebold, Munich. 



Prof. Albrecht Kolliker, Wurtzburg. 



Dr. Franz Leydig, Wurtzburg. 



Dr. Heinrich Meller, Wurtzburg. 



Maj. T. C. Downie, St. Simon's Island, Ga. 



J. P. Postell, Esq., St. Simon's Island, Ga. 



Dr. Geo. Smith, Philadelphia. 



Hon. T. L. Clingman, Asheville, S. C. 



Dr. Edward Hallowell, Philadelphia. 



Members Elected. 

 Charles D. Carr, Esq. 

 Henry W. Carr, Esq. 

 Robert Chapman, Jr. Esq. 



MAY 15th, 1857. 



President L. R. Gibbes in the chair. 



Prof. McCrady said that the common opinion among naturalists 

 with regard to the history of specific form, appeared to be, that 

 the}'' remained absolutely unchanged, from the time of their first 

 creation, through all the ages of their existence. Mr. McCrady 

 believed that no researches which could satisfactorily test the 

 truth of this opinion had ever been made known to the world. He, 

 himself, believed that in one sense a species always remained the 

 same in form, viz.: that it never could, b}^ any kind of transform- 

 ation, become another species distinct from that which it had first 

 been created. But he raised the question whether it was consistent 

 with the analogy of nature to suppose that each specific form did 



