iv CONTENTS. 



Proceedings, Etc. 



PAQB 



Proceedings from March 11th to June 10th, incltisive . . 92 



Obituary Notices : 



John Hopkinson, F.L.S., F.Z.S., F.G.S., F.R.M.S, . 103 



George Stephen West, M.A., D.Sc, F.L.S. . . .104 



PAET No. 86, NOVEMBEE 1920. 



Papers. 



Chab,les D. So ah, F. L. S. , F. R. M. S. , and W. Williamson, F. R. S. E. , 



F.L.S, Hydracarina: The genus Eylais io<r. (Plate 3). 107 

 A. E. Hilton. A Log and some Mycetozoa .... 131 

 G. T. Hahkis. The Desmid Flora of a Triassic District . . 137 



Robert Paulson, F.L.S., F.R.M.S. The Microscopical Struc- 

 ture of Lichens. (Plate 4) . . . . . .163 



Notices op Books. 



A Guide to the Identification of our More Useful Timbers, by 

 Herbert Stone ....... 



Minerals and the Microscope, by H. G. Snaith . 



The Mycetozoa, by Gulielma Lister ..... 



Guide to British Mycetozoa ...... 



An Introduction to the Study of Cytology, by Prof. L. Doncaster 



Roll of Honour 



171 

 171 

 172 

 172 

 173 



175 



Proceedings, Etc. 



Fifty-fourth Aimual Report (1919) 177 



Treasurer's Report (1919) 182 



Proceedings from October 14th, 1919, to June 8th, 1920 . . 183 



PAET No. 87, NOVEMBEE 1921. 



Papers. 



Portrait of Dr. E. J. Spitta .... (Frontispiece) 

 F. Addey, B.Sc. A Universal Scale for the Measurement of 



Microscopic Drawings. (Figs. 1 and 2 in the Text) . .211 



F. Martin Duncan, F.R.M.S., F.R.P.S., F.Z.S. Some Methods 



of Preparing Marine Specimens ..... 215 



E. D. Evens. Fluid Moimting 221 



E. D. Evens. Mounting Freshwater Algae, Mosses, etc, , . 225 



Stanley Hirst, Notes on Parastic Acari, (Figs, 1-3 in the 



Text) ....,,.., 229 



