Cuiitoiiian.] . 2 [May 6, 



and two courses only have been given ; the first, by Mr. E. S. 

 Morse, Curator of Mollusks, upon the natural history of Shell 

 Fish, a series of six lectures, at which about »ixty persons 

 were present ; the second, by Mr. Horace Mann, Curator of 

 Botany, upon the structure of Plants, a series of eight lec- 

 tures, attended by about one hundred persons. 



Twenty general meetings of the Society, seven of the 

 Section of Microscopy, and nine of the Section of Entomol- 

 ogy have been held during the year. The average attend- 

 ance at the general meetings has been nearly forty, and at 

 each of the Sections a little more than nine. 



At these meetings, eighty-six communications — nearly 

 double the number of the previous year — have been pre- 

 sented by thirty-nine individuals, viz., fifty-six communica- 

 tions by thirty-one individuals at the general meetings ; four 

 communications by two individuals at the meetings of the 

 Section of Microscopy ; and twenty-six communications by 

 eight individuals at those of the Section of Entomology, 

 under the following titles : — 



A. Agassiz. On the position of the sandstone of the southern 

 slope of a portion of Keweenaw Point, Lake Superior. June, 

 5, 1867. 



Prof. L. Agassiz. Remarks upon the antiquity of nlan. October 

 16, 1867. 



Remarks upon Dr. Wilder's paper, on the want of symmetry in 

 leaves. November 6, 1867. 



Comparison of the aurochs of Europe with the bison of America. 

 November 6, 1867. 



Remarks on the age of certain rocks in Scotland, formerly referred 

 to the Old Red Sandstone. November 20, 186 7. 



Remarks upon the Rev. Mr. Perry's paper, on the Red Sandstone 

 of Vermont. December 18, 18C7. 



Observations upon the classification of the Siluroid fishes. De- 

 cember 18, 1867. 



T. T. BouvK. Notice of new localities of minerals. Mcnj 1,1867. 



