432 PROCEEDINGS OF THE ACADEMY OF [1889. 



Harrison Allen, of this city ; and to Mr. Charles B. Cory, of 

 Boston. Some of this material is still outstanding. 



Respectfully submitted, 



Angelo Heilprin, 



Curator-in- Charge. 

 Joseph Leidy, 



Ch'n Curators. 



REPORT OF THE BIOLOGICAL AND MICRO- 

 SCOPICAL SECTION. 



During the past year ten meetings were held with an average at- 

 tendance of eight members. 



The following new members were elected : — Harold Wingate, 

 Lancaster Thomas, Edward Bancroft. 



H. H. Burchard was admitted as a contributor. 



The following is a summary of the work done during the year : — 



December 3, 1888. Resume of biological work during 1888, lect- 

 ure by Prof. John A. Ryder. 



December 3, 1888. Communication upon Helicosporium ellip- 

 ticum, by Dr. Geo. A. Rex. 



December 3, 1888. Notacordal cells, by Prof. Ryder. 



January 7, 1889. Upon the Pitcher plants in reference to their 

 digestive function, by Dr. J. B. Brinton. 



January 21, 1889. Upon the cultivation of Fungi, by Dr. Rex. 



February 4, 1889. Rock sections, by Lancaster Thomas. 



February 4, 1889. Upon Botrytis, by Dr. L. Brewer Hall. 



February 18, 1889. Upon two new species of Trichia from Mon- 

 tana, by Dr. Rex. 



February 18, 1889. Diatoms from Mobile Bay, by Dr. Hall. 



March 4, 1889. Upon Psoriasis, and on different methods of 

 staining, by Dr. Hartzell. 



March 4, 1889. Upon Hemiarcyria Karstenii, by Mr. Wingate. 



May 6, 1889. Upon Karyokinesis, by Prof. Ryder. 



May 6, 1889. A new Fuligo from Nebraska, by Dr. Rex. 



June 3, 1889. Upon Fungi, by Dr. Rex. 



November 4, 1889. Upon the generic characteristics of Coma- 

 tricha, by Dr. Rex. 



November 4, 1 889. Upon a new Myxomycete Chondrioderma, by 

 Mr. Wingate. 



