y 
Prof. A. Hyatt. Remarks on Distortions of Lobster’s Claws 278 
General Meeting , November 2, 1881 279 
Mr. W. 0. Crosby. The Classification of Textures and Structures of Rocks 280 
Dr. M E. Wadsworth. On the Trachyte of Marblehead Neck, Mass 288 
General Meeting , November 16, 1881 294 
Prof. D. P. Penhallow. Temperature of Trees (with plate 4) 294 
General Meeting , December 7, 1881. 299 
Election of Members 299 
Remarks on the Condition of the Water Supply of Boston 299 
Dr. W. F. Whitney. On a wounded Skull from the Caves of Coahuila, Mex. . . . 300 
General Meeting , December 21, 1S81 300 
Mr. J. Amory Jeffries. On the Claws and Spurs of Birds’ Wings 301 
Dr. M. E. Wadsworth. Notes on the Geology of Marblehead, ]jMass 306 
General Meeting, January 4, 1882 306 
Election of Members 306 
Prof. Edw. S. Morse. The Variations of the Shells of the Kjoekenmoeddings . .. 307 
Miss Mary H. Hinckley. Some Differences in the Mouth Structure of Tadpoles 
of the Anourous Batrachians found in Milton, Mass, (with plate 3) 307 
Dr. M. E. Wadsworth. On Picotite from Mt. Shasta, Cal 314 
General Meeting , January 18, 1882 315 
Mr. William M. Davis. On the Classification of Lake Basins 315 
General Meeting, Feb, 1, 1882 381 
Prof. H. W. Haynes. Indications of an early race of Men in New England 382 
Mr. S. H. Scudder. A new and unusually perfect Carboniferous Cockroach 
from Mazon Creek, 111 391 
Dr. W. J. Hoffman. List of Birds observed at Fo'rt Berthold, D. T., in Septem- 
ber, 1881 397 
Mr. F. W. Putnam. Remarks on Stone-implements from Marshfield, Mass., 
and Sag Harbor, N. Y 405 
Mr. S. Garman. On mounting museum specimens; and on the nesting of the 
Rock- wren 406 
Dr. M. E. Wadsworth. Zircon-syenite from Marblehead, Mass 406 
General Meeting , Feb. 16, 1882 407 
Section of Entomology, Feb. 22. 1882. 407 
Mr. S. H. Scudder. Occurrence of 'southern Butterflies in Maine 407 
Notes on Tertiary Neuroptera from Florrisant and Green 
River 407 
General Meetings , March 1 and 15, 1882 410 
Mr. Wm. Trelease. Structures which favor Cross-fertilization in several plants. 410 
Mr. J. S. Kingsley. On the development of Molgula manhattensis 441 
Gift of Mr. Fred. Habirshaw’s collection of Diatomaceae 451 
General Meeting, April 5, 1882 452 
Mr. N. F. Merrill. Concerning the Lithological Collection of the Fortieth 
Parallel Survey 452 
General Meeting , April 19, 1882 471 
Section of Entomology, Apr. 26, 1882 471 
Index. 472 
Errata 475 
