1898.] NATURAL, SCIENCES OF PHILADELPHIA. 519 



Recorder, Stewardson Brown. 



Secretary, Wm. A. Shryock. 



Treasurer and Conservator, . . . Witmer Stone. 



Respectfully submitted, 



Witmer Stone. 



Conservator. 



REPORTS OF THE PROFESSORS. 



Henry A. Pilsbry, Professor in the Department of Mollusca, 

 reports that during the year he has delivered a course of lect- 

 ures upon bivalve mollusks. Several special reports upon par- 

 ticular groups of mollusks, based upon material in the collection of 

 the Academy, have been prepared and published in the Proceedings 

 of the Academy. Progress in the classification of the collection has 

 been made, the details of which may be found in the report of the 

 Conservator of the Conchological Section. 



Daniel G. Brinton, M. D., Professor of Ethnology, reports 

 that during the year 1898 a course of lectures, free to the public, 

 was delivered by him on various ethnological subjects, in the Hall 

 of the Academy. They were well attended, and considerable inter- 

 est was shown. 



The collections in this department are well displayed and care- 

 fully looked after by the Curators. 



Henry Skinner, M. D., Professor in the Department of Insecta,. 

 reports having delivered a course of six illustrated lectures on ento- 

 mology in connection with the Academy's Ludwick Institute Course. 

 He refers to his report as Conservator of the Entomological Section 

 for a statement of other work accomplished during the year. 



