NATURAL SCIENCES OF PHILADELPHIA. 145 



May 3d. 

 Vice-President Vaux in the Chair. 



Fourteen members present. 



Mr. Cassin informed the Academy that our late fellow member, Mr. 

 Samuel Ashmead, had bequeathed to the Academy his entire collection 

 of Algae, together with the privilege of selecting from his mineralogi- 

 cal cabinet such specimens as may be desirable. 



May 1(M. 

 Vice-President Vaux in the Chair. 

 Thirteen members present. 



May 17th. 



Mr. Lea in the Chair. 



Twenty-two members present. 



A paper was presented for publication entitled " New Unionidae, 

 Melanidae, &c, chiefly of the United States." By Isaac Lea. 



May 24th. 

 Vice-President Bridges in the Chair. 



Eighteen members present. 



A paper was presented for publication entitled " Descriptions of new 

 marine Invertebrata from Puget's Sound, &c." By Dr. Wm. Stimp- 

 son. 



May 31st. 

 Vice-President Vaux in the Chair. 



Sixteen members present. 



On Report of the respective Committees, the paper of Mr. Lea, read 

 May 17th, was ordered to be published in the Journal, and the follow- 

 ing papers in the Proceedings : 



Critical Remarks on the Genera SEBASTES and SEBASTODES of Ayres. 



BY THEODORE GILL. 



In the Proceedings of the California Academy of Natural Sciences, "Re- 

 marks in relation to the Fishes of California, which are included in Cuvier's 

 genus Sebastes," and subsequently, in the Proceedings of the Zoological So- 

 ciety of London, "Notes on the Sebastoid Fishes occurring on the coast of 

 California, TJ. S. A.,"* have been published by Wm. 0. Ayres, M. D., C. M. Z. S. 



* I have been favored by Prof. Baird with the advance sheets of these Proceedings. 



1864.] 10 



