1886.] NATURAL SCIENCES OF PHILADELPHIA. 319 



Four lectures were delivered in course by Dr. Benjamin Sharp, 

 upon the " Special Senses," October 18. 



Communication by Prof. J. A. Ryder, upon " The Eggs of 

 Pelagic P'ishes ;" by Mr. H. Wingate, upon " Cribraria purpura." 



November 1. Communication by Dr. L. B. Hall, upon the 

 ''Comparative Merits of Demar and Canada Balsam mounts;" 

 by Prof. J. A. Ryder, upon the " Moulting of the Lobster," also 

 on a " New Section Cutter;" by Dr. J. B. Brinton, upon a " New 

 Cell for Opaque Objects." 



November 15. Communication by Dr. George A. Rex, upon 

 " The Use of the Brass Cell." 



Two new members were elected : Dr. Charles S. Dolley, Prof. 

 John A. Ryder. 



Mr. E. S. Campbell resigned as a contributor. 



The Section passed a resolution of respect upon the death of 

 Dr. J. G. Richardson, who, although not connected with the 

 Section at the time of his death, had been at one time an active 

 and useful member. 



Very respectfully, 



Robert J. Hess, 



Recorder. 



REPORT OF THE CONCHOLOGICAL SECTION. 



The Recorder of the Conchological Section respectfully re- 

 ports that during the year ending December 1 , 1886, the Academy 

 has continued the publication of conchological papers as hereto- 

 fore. The death of one member has occurred, that of Mrs. Lucy 

 W. Sa.y, the venerable and esteemed widow of the eminent 

 naturalist, Thomas Say, which occurred November 15th last, at 

 the advanced age of 86 years. 



No new members or correspondents have been elected, nor has 

 there been any change in the By-Laws of the Section. 



Mr. George W. Tryon, Jr., Conservator, reports as follows : 



" During the past year, thirty-nine donations and purchases of 

 shells have been received from twenty-six persons, aggregating 

 1252 trays and 7506 specimens. A detailed list of these acces- 

 sions is appended (see 'Additions to Museum '). 



"Among them may be especially mentioned the purchase of 



