56 [July, 1841. 



out ; preferred its own cell to a fresh one ; devoured a part 

 which was quite dry ; about July 4th or 5th, closed the open- 

 ing of its cell with a mixture of dust of straw and a cement, 

 and besmeared it throughout great part of its extent with a 

 black substance ; remained quiescent and apparently feeble till 

 July 7th ; and between the 7th and 9th escaped, leaving a hole 

 of sufficient size for its passage in the paper cover of a bottle, 

 and no visible skin in its former abode. 



STATED MEETING, July 20, 1841. 

 Vice President Morton in the Chair. 



DONATIONS TO LIBRARY. 



Monograph of the Lymniades of North America. By S. Steh- 

 man Haldeman. 8vo. 1841. From the author. 



History of British Zoophytes. By George Johnston, M. D. 

 8vo. Edinburgh, 1838. From Dr. Morton. 



DONATIONS TO CABINET. 



A series of fourteen specimens of Unio quadrulus, showing the 

 growth of the shell at different ages. (Variety lachrymo- 

 sus, Lea.) U. lens, six specimens. U. siliquoideus, five spe- 

 cimens. Anodonta pavonia, three specimens. All in re- 

 markable perfection. From Mr. J. G. Anthony, of Cincin- 

 nati, through Mr. Phillips. 



Io spinosus, Tennessee. From Dr. Troost. 



Conus princeps, and three specimens of Helix Sayi, (Binney,) 

 from Mr. J. S. Phillips. 



