9 



February 9, 1899. — Public lecture in the lecture hall of 

 the American Museum of Natural History by Dr. Bashford 

 Dean, entitled " A Naturalist on the Pacific Coast," with 

 stereopticon illustrations. 



February 14, 1899. — The Vice-President in the chair. 

 Five members and four visitors present. 



Dr. J. Dwight, Jr., presented " Notes on the Moults and 

 Plumages of Some of Our Common Birds." 



February 28, 1899. — Mr. L. S. Foster in the chair. Nine 

 members and twelve visitors present. 



Dr. J. L. Wortman presented remarks on ''Explora- 

 tions for Extinct Reptiles in the Rocky Mountain Plateau 

 Region." The explorations referred to were those con- 

 ducted by the American Museum during the last two 

 summers in the Jurassic beds near Medicine Bow in 

 Southern Wyoming. Dr. Wortman said that these gigantic 

 extinct reptiles known as dinosaurs were first discovered in 

 this country by Professor O. C. Marsh of Yale, who had 

 obtained his remarkable collection from this locality. This 

 is the richest of the several regions in North America where 

 these reptiles are found. Dr. Wortman described very 

 fully the methods adopted by his party in locating the 

 specimens, removing them from the matrix, and preparing 

 them for shipment; and he showed lantern slides illustrat- 

 ing the work and camp life of the party, and also restora- 

 tions of dinosaurs by Professor Marsh and Mr. Charles R. 

 Knight. 



March 14, 1899. — Annual Meeting. The President in the 

 chair. Eleven members and seven visitors present. 



The Secretary presented his Annual Report, as follows : 



" The Society has held during the past year sixteen 

 meetings, — two meetings each month, with the exception 

 of June, July, August and September. 



" Although the attendance has fallen off slightly from 

 that of last year it has been greater than for any year prior 

 to 1898. The total attendance at all meetings has been 

 303. The average attendance has been of members 9, and 

 of visitors 10. The largest attendance at any one meeting 



