4^4 [Sept. 2, 



States Geological Survey and Smithsonian Institution (Bu- 

 reau of Ethnology), Washington ; Observatorio Meteorologico 

 Central, Mexico; California Academy of Sciences, San Fran- 

 cisco. 



Letters of acknowledgment from the Institut Egyptien, 

 Cairo (123, and asking for 86, 87, 88); Natural Hictory Society, 

 Odessa (96-123) ; Comitc Geologique, St. Petersburg (123); 

 Observatoire de Tashkent (96-121); Deutsche Geologische 

 Gesellschaft, Berlin (120-123) ; Naturwissenschaftlicher Yerein, 

 Bremen (12 1-124); Naturforschende Gesellschaft, Emden (124); 

 Prof. Dr. Paul Albrecht, Hamburg (124) ; Naturhistorische 

 Gesellschaft, Niirnberg (121-123) ; Verein flir vaterliindische 

 Naturkunde in Wiirtemberg, Stuttgart (117-121); Istituto 

 Veneto d Scienze, Lettere ed Arti, Venezia (114-116); R. 

 Acadeniia de la Ilistoria, Madrid (123, 124) ; Academic Poy- 

 ale des Sciences de Lisbonne (115, 116, 117); Observatorio 

 Astronomico jSTacional Mexican©, Tacubaya (124) ; Canadian 

 Institute (125); Horatio Hale, Clinton, Canada; Geological 

 Survey of Canada, Ottawa (125) ; Society of Natural History, 

 Portland, Me. (125); New Hampshire Historical Society, 

 Concord (125) ; Prof. C. H. Hitchcock, Hanover (125); Bos. 

 ton Athenaeum, Society of Natural History, Historical So- 

 ciety, Public Library, American Academy of Arts and 

 Sciences- of Massachusetts, Messrs. S. P. Sharpies, D. Hum- 

 phreys Storer, Boston (125) ; Museum of Comparative Zoiilogy, 

 Mr. Robert N. Toppan, Cambridge (125) ; Free Public Library, 

 New Bedford (125); Dr. Pliny Earle, Mr. Benj. Smith Ly- 

 man, Northampton (125); Essex Institute, Salem (125); Ameri- 

 can Antiquarian Society, Worcester (125) ; Rhode Island 

 Historical Society, Franklin Society, Providence (125) ; Con- 

 necticut Historical Society, Hartford (125) ; Yale College 

 Library, Prof. Eli as Loomis, New Haven (125); New York 

 State Library, Albany (125) ; Buffalo Library, Society of 

 Natural Sciences, Buffalo (125); Dr. Edward North, Clin- 

 ton, N. Y. (125) ; Profs. T. F. Crane, B. G. Wilder, Ithaca 

 (125) ; New York Hospital, Astor Library, Historical Society, 

 Columbia College, University of the City of New York, Prof. 



