100 FIFTIETH ANNUAL REPORT. 



to his residence in Cornwall and his advanced age (he was in his 

 eighty-second year at the time of his death), he had not been 

 able to attend the meetings for a long time. An obituary notice 

 appeared in the April number of this Journal. In June the death 

 of Mr. G. Yogeler occurred ; he had been an active member of 

 great assistance, especially in the Curator's department. A former 

 member, Mr. B. AV. Priest, died in September ; he had not been 

 to the meetings for many years, but with a kindly remembrance 

 has bequeathed a collection of sponge preparations to the Club. 

 The papers and exhibits during the year were as follows : 



Papers and Exhibits during 1915. 



January 2Wh. — Prof. E. A. Minchin : Notes on the Anatomy of 

 the Eat Flea — Ceratophyllus fasciatus. 



February 23/y7. — The President : The Biological Conception of 

 Individuality. 



March 23rrf. — C. D. Soar : British Hydracarina — Genus Lehertia. 



March 2Srd.—J. AV. Gordon : A " New " Object-glass by Zeiss. 



March 23rcf. — G. T. Harris : Microscopical Methods in Bryo- 

 logical Work. 



April 21th. — M. A. Ainslie : An Addition to the Objective. 



April 27th.— A. A. C. Eliot Merlin : Notes on Diatom Structure. 



May 26th. — J. Grundy : Exhibit — A Fly's Wing, showing crystals 

 formed in the mountant. 



May 26th. — A. E. Hilton : Further Notes on the Cultivation of 

 Badhamia utricularis. 



May 2bth. — E. M. Nelson : Various Insect Structures. 



May 26th. — J. Burton : Hydrodictyon utriculatum. 



May 26th. — Seabury Edwards : On mounting Diatoms in Phos- 

 phorus. 



June 22nd. — Dr. John W. Evans : The Microscopical Examina- 

 tion of Minerals. 



October 26/A. — A. E. Hilton : The Formation of Sporangia in 

 Stemonitis. 



October 26M. — D. Bryce : Five New Species of Bdelloid Rotifers. 



November 2?>rd. — W. R. Traviss : Exhibit — A Binocular Addition 

 to Swift's Portable Binocular. 



November 2?>rd. — The President : On Sponges, General Structure, 

 and Spicules. 



