FORTY-EIGHTH ANNUAL RETORT. 355 



April 0. D. Soar, F.L.S., F.R.M.S. Two New Species of 

 Water-mites. 

 ,, G. T. Harris. The Collection and Preservation of the 



Hydroida. 

 May. T. A. O'Donohoe The Minute Structure of Coscino- 

 discics asteromphalus and of two Species of Pleuro- 

 sigraa. 

 June. H. Sidebottoin. The Lagenae of the South-West 

 Pacific. 

 E. M. Nelson, F.R.M.S. On a New Method of Mea- 

 suring the Magnifying Power of an Objective. 

 Oct. James Murray, F.R.S.E. The Gastrotricha. 



,, E. M. Nelson, F.R.M.S. Note on an Improved Form of 



Apertometer. 

 Nov. James Burton. On the Disc- like Termination of the 

 Flagellum in some Euglenae. 

 James Burton. On a Method of Marking a Given 



Object on a Mounted Slide for Future Reference. 

 E. M. Nelson, F.R.MS, On the Measurement of the 

 Initial Magnification of Objectives. 

 Dec. B. M. Draper. On Dark-ground Illumination with the 



Greenhousdi Binocular. 



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n 



D 



At the Ordinary Meetings the following slides and apparatus 

 were exhibited : 



Jan. W. Watson Baker. New Model Microscope, having a 

 Side screw Fine Adjustment, and New Objective 

 Changer, etc. 

 A. A. C. Eliot Merlin, F.R.M.S. Photomicrographs of 



Coscinodiscus heliozoides, showing Pseudopodia. 



March. A. A. C. Eliot Merlin, F.R.M.S. Five Photomicro- 

 graphs taken at x 320 of various Diatoms. 



April. Presented by G. T. Harris. Mounted Hydrozoa, ex- 

 hibited under Microscopes by Messrs. H. F. Angus 

 &Co. 



May. J. Watson, a visitor. A Slide showing Multiple Images 

 formed by the Cornea of the Eye of a Bee. 

 E. Pitt. Various Microtomes exhibited and explained, 



3> 



with Demonstration of Ribbon Section-cutting 







Journ. Q. M. C, Series II. No. 74. 25 



