CONTENTS OF VOL. XXV. 
Page 
Annual Meeting, May 7, 1890 1 
Prof. Alpheus Hyatt. Report of the Curator 1 
Dr. J. Walter Fewkes. Secretary’s Report.. 19 
Mr. C. W. Scudder. Treasurer’s Report 25 
Election of Officers 26 
Correspondence between the Council and the Park Commissioners 27 
Election of Members 42 
Dr. J. A. Jeffries. Lamarckianism and Darwinism 42 
Prof. H. W. Haynes. A palaeolithic implement from the valley of the Tus- 
carawas, Ohio 49 
Rev. W. J. Holland. Asiatic Lepidoptera (with Plates III-V) 52 
Prof. Alpheus S. Packard. Notes on some points in the external structure and 
phylogeny of lepidopterous larvae (with Plates I, II) 82 
General Meeting , May 21, 1890 115 
Prof. W. O. Crosby. Composition of the till or bowlder-clay 115 
Mr. Warren Upham. Geographic limits of species of plants in the basin of the 
Red River of the North 140 
General Meeting, November 5, 1890 172 
General Meeting, November 19, 1890 172 
General Meeting, December 3, 1890 172 
General Meeting, December 17, 1890 173 
Mr. Thomas T. Bouve. Kame ridges, kettle-holes, and other phenomena atten- 
dant upon the passing away of the great ice-sheet in Hingham, Mass, (with 
Plate YI) 173 
General Meeting, January 7, 1891 183 
General Meeting, January 21, 1891 183 
Prof. A. E. Dolbear. On chemism or the organization of matter (with figures) . 183 
Prof. Jules Marcou. Geology of the environs of Quebec, with maps and sections 
(Plates YII-IX) 202 
General Meeting, February 4, 1891 228 
General Meeting, February 18, 1891 228 
Mr. Warren Upham. Walden, Cochituate, and other lakes enclosed by modified 
drift 228 
Prof. G. F. Wright. Additional notes concerning the Nampa image 242 
Mr. J. Crawford. Notes on Central-American archaeology and ethnology 247 
Mr. Charles L. Whittle. Genesis of the manganese deposits of Quaco, New 
Brunswick 253 
General Meeting, March 4, 1891 258 
Prof. N. S. Shaler. The antiquity of the last glacial period 258 
General Meeting, March 18, 1891 268 
General Meeting, April 1, 1891 268 
General Meeting, April 15, 1891 268 
Annual Meeting, May 6, 1891 269 
Prof. Alpheus Hyatt. Report of the Curator 269 
