1906.] NATURAL SCIENCES OF PHILADELPHIA. 261 



May 1. 



Mr. Arthur Erwin Brown, Vice-President, in the Chair. 

 Forty-six persons present. 



The PiibHcation Committee reported that a paper entitled "Addi- 

 tional New Species of Polychseta from the North Pacific," by J. 

 Percy Moore, had been offered for publication (April 19, 1906). 



The deaths of Clarence H. Clark, a member, March 13, and of Lionel 

 S. Beale, a correspondent, March 28, were announced. 



Dr. Benjamin Sharp made a communication on pearls and pearl 

 fisheries. (No abstract.) 



May 15. 



The President, Samuel G. Dixon, M.D., in the Chair. 



Thirty-four persons present. 



The Publication Committee reported that a paper entitled ' 'Records 

 and Descriptions of Non-Saltatorial Orthoptera from British Guiana," 

 by James A. G. Rehn, had been offered for pubhcation (May 7, 1906). 



The death of Carl Y. Yischer, M.D., a member, May 14, was 

 announced. 



Henry Leffman, M.D., made a communication on the newer views 

 regarding the nature of matter and their bearings on biology. (N 

 abstract.) 



Mr. Walter F. Herzberg was elected a member. 



The following were ordered to be printed : 



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