260 



strongly impregnated with it. It had been thought that the 

 Great Salt Lake of Western America derived its supply from 

 deposits of rock salt in the neighborhood, but he thought it 

 would be found that these deposits indicated the former borders 

 of the Lake, when it was higher than now. The ocean itself 

 might be regarded as a great lake without an outlet. It proba- 

 bly derived its saline materials from the rivers flowing into it, or 

 from volcanic eruptions, principally, however, from the former 

 source. 



In confirmation of Prof. Rogers's views, Dr. Jackson stated, 

 that the water of the river Jordan was found on evaporation 

 to contain the same ingredients as the Dead Sea, into which it 

 flows. 



Dr. Jackson presented, in the name of General Caleb 

 Gushing, a skull from Mexico, which, from the character 

 of the objects found with it, he believed to be an undoubted 

 Aztec skull. The thanks of the Society were voted for the 

 donation. 



A specimen of Alca torda, Razor-billed Auk, young, 

 was presented in the name of Mr. Theodore Lyman. The 

 thanks of the Society v»^ere voted for the donation. 



Mr. Desor presented a specimen of Ground Squirrel, 

 Tamias quadrivittatus, from the shores of Lake Superior. 



A specimen of Tetraodon was presented in the name of 

 Dr. Storer. 



March 20, 1850. 



Dr. C. T. Jackson, Vice-President, in the Chair. 



Present, twenty-four members. 



Mr. Teschemacher exhibited to the Society several specimens 

 of Palms from the country back of Singapore. They were all 

 of the creeping or climbing order of Lepidocaryinse, namely 



