CONTENTS OF VOL. XXI. 
Annual Meeting , May 5, 1880 1 
Prof. A. Hyatt. Custodian’s Report 1 
Mr. E. Burgess. Secretary’s Report 10 
Mr. C. W. Scudder. Treasurer’s Report 13 
Officers for 1880-81 14 
President S. H. Scudder. Remarks on taking the chair 15 
Resolution and remarks on Mr. T. T. Boitve’s withdrawal from the Presidency. .. 16 
Election of Members 18 
Dr. A. S. Packard, Jr. New Ichneumon Parasites of North American Butter- 
flies-. 18 
General Meeting , May 18, 1880 39 
General Meeting , October 6, 1880 39 
Mr. T. T. Bouve. Remarks on the death of Dr. C. T-. Jackson 39 
Col. Theo. Lyman. Notice of Count L. F. Le Pourtales 47 
Mr. W. O. Crosby. Notice of Mr. L. S. Burbank 49 
Mr. John Orne, Jr. Notice of Mr. Geo. D. Smith 51 
Prof. Wm. R. Nichols. On the Temperature of Lakes and Ponds. (Plate 1.)... 53 
General Meeting , Oct. 20, 1880 82 
General Meeting , Nov. 3, 1880 83 
Prof. A. Hyatt. Moulting of the Lobster, Homarus americanus 83 
Mr. F. W. Putnam. On a piece of Pottery from St. Francis River, Ark 90 
General Meeting , Nov. 17, 1880 91 
Dr. M. E. Wadsworth. The Filling of Amygdaloidal Cavities and Veins in the 
Keweenaw Pt. District of Lake Superior. Reply to Prof. Dana 91 
Miss Mary H. Hinckley. Notes on Eggs and Tadpoles of Hyla Versicolor 104 
Dr. B. Joy Jeffries. Expression of Color-blind Persons 107 
Mr. F. W. Putnam. Nature of a peculiar Carved Bone found at Scarborough, 
Me 107 
General Meeting, Dec. 15, 1880 109 
Mr. W. O. Crosby. Geology of Frenchman’s Bay, Me 109 
Mr. Wm. M. Davis. Remarks on the Geology of Mt. Desert, Me 117 
Mr. F. W. Putnam. Exhibition of an archaeological collection from Coahuila, 
Mexico 118 
General Meeting , Jan. 5, 1881 120 
Election of Members 120 
Dr. M. E. Wadsworth. The appropriation of the name Laurentian by the 
Canadian Geologists 121 
