253 



were, against the wall of the ordinary column, about a fifth to a 

 third of a revolution of the whorl from the aperture. This fulcrum 

 adds much to the main strength of the column, and the whole stabi- 

 lity of the structure. It was found by him to exist in the following 

 species ; 



CarocoHa spinosa. Lea. Helix leporina. Gould. 



,, Edgariana. Lea. „ Lecontii. Lea. 



Helix hirsuta. Say. Polygyra Troostiana. Lea. 



„ monodon. Racket. „ Dorfuilliana. Lea. 



„ Leai. Ward. 



The above-mentioned papers, by Mr. Lea, were referred to 

 a Committee, consisting of Dr. Hays, Dr. Ruschenberger and 

 Dr. Leidy. 



On motion of Dr. Dunglison, permission was granted to the 

 Historical Society of Pennsylvania, to have a copy of the por- 

 trait of Mr. Duponceau taken, under the direction of the Li- 

 brarian. 



Mr. Trego, the Reporter, laid upon the table No. 47 of the 

 Proceedings of the Society, just published. 



Pending nominations, Nos. 271 to 279, inclusive, were read. 



Stated Meeting, March 19. 



Present, fifteen members. 



Dr. Patterson, President, in the Chair. 



Dr. J. Forsyth Meigs, a recently elected member, was intro- 

 duced to the President, and took his seat. 



Letters were read : — 



From the Royal Asiatic Society, dated London, 15th No- 

 vember, 1851, returning thanks for No. 46 of the Proceedings 

 of this Society : — 



From the New York Historical Society, dated New York, 

 March, 1852, acknowledging the receipt of No. 47 of the 

 Proceedings: and — 



From the New Jersey Historical Society, dated Newark, 



VOL. V. — 2 N 



