IV 



Dr. H. A. Hagen. The Genus Colitis 150 



General Meeting, January 3, 1883. . '. 178 



Election of Members , 178 



Mr. C. 0. Whitman. Note on a rare form of the Blastoderm in the Chick 178 



Mr. T. Nelson Dale. A Contribution to the Geology of Rhode Island (with 



Plates 1-3) 176 



General Meeting, January 17, 1883 201 



General Meeting, February 17, 1883 201 



Dr. M. E. Wadsworth. Some instances of Atmospheric Action on Sandstone.. . 201 



Mr. J. Amory Jeffries. The Epidermal System of Birds (with Plates 4-6) 202 



General Meeting, March 7, 1883 241 



Election of Members 241 



General Meeting, March 21, 1883 242 



Prof. S. P. Sharples. Turk's Island and the Guano Caves of the Caicos Islands. 242 



Mr. S. Garman. Remarks on the extinction of the fossil horses of America 252 



G, neral Meeting, April 4, 1883 252 



Prof. A. Hyatt. Genera of Fossil Cephalopods 253 



General Meeting, April 18, 1883 339 



Mr. Wm. M. Davis. Remarks on the geology of Becraft's Mountain on Hudson. . 339 



Annual Meeting, May 2. 1883 



Prof. A. Hyatt. Curator's Report 339 



Mr. Edw. Burgess. Secretary's Report 354 



Mr. C. W. Scudder. Treasurer's Report 356 



Election of Officers for 1883-4 357 



Election of Members 357 



Mr. F. W. Putnam. Remarks on earthworks in the Little Miami Valley 358 



General Meeting, May 16, 1883 358 



Prof. S. P. Sharples. Specific gravi y, ash and description of the wood, of some 



exotic trees 359 



General Meeting, October 3, 1883 363 



Mr. Wm. Brewster Birds of the Gulf of St Lawrence 364 



Dr. M. E. Wadsworth. The Fortieth Parallel Rocks 412 



Mr. F. W. Putnam. Explorations of emblematic Mounds in Ohio and Wisconsin. 432 



General Meeting, October 17, 1883 433 



Dr. G. F. Waters. Remarks on the sense of Taste in Birds 433 



Mr. W. 0. Crosby. On the Chasm called " Purgatory " in Sutton, Mass 434 



General Meeting, November 7, 1883 437 



Election of Members 437 



Prof. H. W. Haynes. Agricultural Implements of New England Indians 437 



Mr. W. Crosby. Origin of Continents and Ocean Basin 443 



Dr. M. E. Wadsworth. Notes on the Lithology of the Island of Jura 485 



General Meeting, November 21, 1883 490 



General Meeting, December 5, 1883 490 



LIST OF PLATES. 



Plates 1, 2 and 3, Geology of Rhode Island. 

 Plates 4, 5, and 6, Epidermal System of Bird* 



