FIFTY-FIRST ANNUAL REPORT. 299 



ated members, and one whose place it will be difficult indeed to 

 fill. Obituary Notices of several of these will be found in the 

 Journal. 

 The papers and notes communicated have been as follows : 



Papers and Notes during the Year 1916. 



January 2Wh. — Mr. G. T. Harris : On the Collection and Preserva- 

 tion of Desmids. 

 February 22nd. — Exhibition of Micro-objects by Mr. W. E. 



Watson Baker, with short explanation of the chief examples. 

 February 22nd. — The Presidential Address : Some Factors of 



Evolution in Sponges. 

 March 25th.— Mv. W. Milne, M.A., B.Sc. : On the Bdelloid 



Rotifera of South Africa. 

 April 25th. — Mr. Chapman Jones : On the Secondaries or Dotted 



Structure in the Pinnulariae. 

 April 25th. — Mr. A. A. C. Eliot Merlin : Nitzschia singalensis as a 



Test-object for the Highest Powers. 

 April 25th. — The President : On the Spicular Structure of the 



Sponge Geodia japonica. 

 May 23rd. — Photographs and Radiographs of Foraminifera, 



with explanatory remarks by Mr. E. Heron-Allen, President 



R.M.S. ; and Mr. J. E. Barnard, F.R.M.S., on A Method of 



exhibiting the Internal Structure of Foraminifera by means 



of X-rays. 

 June 21th. — Mr. W. Traviss exhibited and described a new 



apparatus for collecting specimens in pond-work. 

 June 21th. — Mr. Wallis Kew : An Historical Account of the 



Pseudo-scorpion Fauna of the British Isles. 

 June 27th. — Mr. A. E. Hilton : On the Sporangial Characters of the 



Mycetozoa and the Factors which influence them. 

 October 2Uh. — Mr. David Bryce read Part II of Mr. W. Milne's 



paper On the Bdelloid Rotifera of South Africa. 

 November 28th. — The President on Gelatinous Sponge Spicules. 

 November 28th.— Mr, S. C. Akehurst, F.R.M.S., exhibited and 



described a tank and weed-holder for use with low-power 



objectives. 

 November 28th. — Mr. N. E. Brown : On the Seeds of Anacampseros 



rubens, and some Allied Plants from South Africa. 



