The following papers and disenssions have been circulated to 

 some extent in the form of slips reprinted from the reports made 

 by the Secretary of the Society in the " Boston Transcript." As 

 here presented, the papers are printed in full, and the discus- 

 sions are not only much fuller than in the weekly reports, but, 

 where it appeared necessary, have been carefully revised by the 

 speakers. 



The Committee on Publication and Discussion take this oppor- 

 tunity to repeat what they have before stated, that the Society 

 is not to be held responsible for the certainty of the statements, 

 the correctness of the opinions, or the accuracy of the nomen- 

 clature in the papers and discussions now or heretofore pub- 

 lished, all of which must rest on the credit or judgment of the 

 respective writers or speakers, the Society undertaking only to 

 present these papers and discussions, or the substance of them, 

 correctly. 



J. D. AV. Frexch, j Committee on 

 C. MiNOT Weld, Puhl'ication and 



B. M. Watson, ) Discussion. 



