Annual Report.] 32 [May 5, 



LETTERS RECEIVED 

 DURING THE YEAR ENDING APRIL 30, 1869. 



From the Academie Koyale des Sciences, etc., de Belgique, Bruxelles, Septem- 

 ber 14th, 1867 ; Bibliotheca Universitatis Lugduno-Batavae, October 22d, 1867; 

 Bataafsch Genootschap der Proefondervindelijke Wijsbegeerto te Rotterdam, 

 October 23d, lb67; Bureau de la Recherche Geologique de la Suede, Stock- 

 holm, December 31st, 1867; Director of the Real Gymnasium und Ober- 

 Realschule, St. Polten, December, 1867; Office of the Geological Survey of 

 India; Der Nassauischer Verein, Wiesbaden, January 6th, 1868; K. K. zoolo- 

 gisch-botanische Gesellschaft, Wien, January, 1868, and February, 1869; 

 Madras Literary Society, March, 1868; Utrecht Society of Arts and Sciences, 

 March, 1868; Smithsonian Institution, April 6th, June 26th, August 8th and 

 December 12th, 1868; Massachusetts Hordcultural Society, June 1st and June 

 26th, 1868; Royal Society of London, April 20th, 1868; Naturforschende Gesell- 

 schaft, Freiburg, May 3d, 1868; Soci^te* des sciences physiques et naturelles du 

 Ddpartement d'llle et Vilaine, Rennes, May 27th, 1868; Museum at Bergen, May 

 28th and October 10th, 1868; Essex Institute, Salem, Mass., May 29th, June 

 28th, August 5th, October 28th, November 24th, December 14th, 1868, January 

 16th, February 3d, March 12th and April 14th, 1869; Naturforschende Gesell- 

 schaft in Bern, May, 1868; Lyceum of Matural History, New York, June 1st 

 and July 15th, 1868, February 8th, March 1st, April 6th and April 12th, 1869; 

 Massachusetts Institute of Technology, June 2d and 23d, and August 13th, 

 1868, April 19th, 1869; Institute of Natural Science, Halifax, N. S., June 8th, 

 1868; New York State Agricultural Society, Albany, June 16th, 18G8; Acad- 

 emy of Sciences of Chicago, June 18th, 1868, and April 29th, 1869; Massachu- 

 setts Historical Society, Boston, June 27th and Sept. 8th, 1868, and April, 1869; 

 Public Library of the City of Boston, June 27th and December 10th, 1868; 

 Schweizerische Gesellschaft, Bern, June, 1868; Amherst College Library, June, 

 1868; Regents of the University of the State of New York, Albany, July 3d, 

 1868; Corporation of Harvard College, Cambridge, July 20th, 1868, and April 

 6th, 1869; Linnean Society, London, July 22d, 1868; Soci^te" Hollandaise des 

 Sciences a Harlem, September 11th, 1868; Socie"te Royale des Sciences a Upsal, 

 September 15th, 1868 : Cercle Artistique, Litte*raire et Scientifique d'Anvers, 

 September 26th, 1868; Acade'mie Royale des Sciences a Amsterdam, October 

 13th, 1868; Naturforschende Gesellschaft des Osterlandes zu Altenburg, Octo- 

 ber 15th, 1868; Corporation of Williams College, Williamstown, October 20th, 

 1868, and April 20th, 1869; the Natural History and Medical Reunion at Heidel- 

 berg, October 21st, 1868; Physikalisch-medizinische Gesellschaft in Wurzburg, 

 October 24th, 1868; Gesellschaft zur Beforderung der Naturwissenschaften zu 

 Freiburg i. B., October 24th, 1868; Naturforschende Gesellschaft, Basel, October 

 30th, 1868; Museum of Comparative Zoology, Cambridge, November 13th, 1868, 



