4 CORRESPONDENCE. — 1857. 



FromNaturhist. Verein d. Preuss. Rh. u. Westphal., April 20th, 1857, acknow- 

 ledging publications. 



From Acad, of Sciences, St. Louis, Mo., Nov. 17th, 1857, acknowledging 

 publications. 



FromNaturhist. Verein d. Pr. Rheinl. u. Westphalens, April 20th, 1857, trans- 

 mitting publications. 



From Naturf. Gesellschaft in Emden, July 9th, transntiitting publications. 



From M. Belhomme, Metz, (Moselle.) 



December 'sth. From Prof. E. D. Porter, Newark, Dec. 3d, 1857, acknowledg- 

 ing his election. 



December 22d. From Royal Society, Edinburg, Nov. 1st, 1856, acknowledg- 

 ing Proceedings. 



