CONTENTS. Vll 



General Meeting, November 17, 1886 336 



Section of Entomology. Meeting, November 24, 1886 337 



General Meeting, December 1, 1886 337 



Prof. F. W.Putnam. Obituai-y of Capt. N. E. Atwood 337 



General Meeting, December 15, 1886 339 



Prof. Wm. M. Davis. Remarks on the mechanical origin of the triassic mono- 



clinal in the Connecticut valley 339 



General Meeting, January 5, 1887 341 



Election of Members 341 



General Meeting, February 2, 1887 341 



General Meeting, February 16, 1887 341 



General Meeting, March 2, 1887 342 



Election of Members 342 



Mr. J. H. Emerton. Remarks on the restoration of the skeleton of Dinoceras 



mirabile — 342 



Prof. Jules Marcou. On the use of the name Taconic 343 



General Meeting, March 16, 1887 356 



Prof. F. W. Putnam. A collection of perforated stones from California 356 



Section of Entomology. Meeting, March 23, 1887 356 



Mr. S. H. Scudder. Cockroaches from the carboniferous period 356 



Glands and extensile organs of larvae of certain blue butterflies 357 



General Meeting, April 6, 1887 358 



General Meeting, April 20, 1887 358 



Dr. J. A. Jeffries. Note on the epidermal system of birds 358 



Annual Meeting, May 4, 1887 360 



Prof. A. Hyatt. Curator's report 360 



Mr, Edward Burgess. Secretary's report 372 



Mr. C. H Scudder. Treasurer's report 375 



Election of Officers for 1887-88 377 



General Meeting, May 18, 1887 379 



Mr. Henry Brooks. Preliminary remarks on the structure of the siphon and 



funnel of Nautilus pompilius (with two plates) 380 



General Meeting, November 2, 1887 383 



Mr. Robert Ridgway. Notes on some type-specimens of American Troglodytidae 



in the Lafresnaye collection 383 



Dr. J . Walter Fewkes. A new mode of life among medusae 389 



General Meeting, November 16, 1887 396 



Prof. A.. Hyatt. Values in classification of the stages of growth and decline, 



with propositions for a new nomenclature 396 



General Meeting, December 7, 1887 408 



Prof. N. S.Shaler. Origin of the divisions between the layers of stratified rocks 408 



General Meeting, December 21, 1887 419 



Prof. F. W. Putnam. Obituary of Miss Cordelia A. Studley 420 



On a collection of palaeolithic implements from America and Europe 421 



Dr. C. C. Abbott. On the antiquity of man in the valley of the Delaware 424 



Rev. G. Fred. Wright. On the age of the Ohio gravel-beds (with figures) 427 



Mr. Warren Upham. The recession of the ice-sheet in Minnesota in its relation 

 to the gravel deposits overlying the quartz implements found by Miss Babbitt at 



Little Falls, Minn, (with a figure) 436 



Prof. F. W. Putnam. Remarks on early man in America 447 



General Meeting, January 4, 1888 450 



Election of Members 450 



Prof. W. O. Crosby. Geology of the outer islands of Boston Harbor 450 



Mr. J. H. Emerton. Changes of the internal organs in the pupa of the milkweed 



butterfly (with a plate) 457 



Mr. Leonhard Stejneger. On the type specimen of Euryzona eurizonoides 



(Lafr) 461 



Prof. F. W. Putnam. Notes on two species of wasps observed at the serpent 

 mound in Ohio 465 



