322 



The former was taken upon a fish-hook by some boys, while 

 fishing near the mouth of Winooski River ; this is the third indi- 

 vidual he had obtained in that neighborhood. The specimens 

 there obtained have been much larger than the measurements 

 given by Dr. De Kay; the shell of the smallest measured 11 

 inches by 9^ on the back, while the same measurements given 

 by Dr. De Kay are 5.3 and 5 inches. Another measured 13 by 

 10|- inches, which differs but little from the present specimen. 

 The Trionyx is very aquatic in its habits ; he had never known of 

 one being found on the land. The thanks of the society were 

 voted for this donation. 



A specimen of polished Freestone, from the Acadia 

 quarry, at Piqtou, Nova Scotia, vi^as presented by Watson 

 Freeman, Esq. ; committed to Mr. Alger. 



A specimen of Copper Ore from Valparaiso was pre- 

 sented by J. M. Rowell, of Lynn ; the thanks of the Soci- 

 ety were voted for these donations. 



Mr. Charles Booth and Dr. J. Gundlach, of Cardenas, 

 Cuba, .were elected corresponding members of the Society. 



August 7, 1850. 

 Dr. C. T. Jackson in the Chair. 

 Present, nineteen members. 



A letter was read from the President informing the 

 Society that the Cambridge Mastodon was at his hall in 

 Chestnut Street, where he invited them to compare it with 

 the Mastodon owned by him. 



A letter was read from M. Vattemare announcing that 

 the sharks offered by the Society to the Museum of Nat- 

 ural History of Paris would be gratefully received by the 

 Professors of that establishment. 



In addition to the specimens of Touraine, he had recently 



