contents. v 



Proceedings, etc. 



TAOE 



Proceedings from March 15th to June 21st, 1901, inclusive . .171 



Objects Exhibited, with Notes. March 1st to September 20th, 1901 . 180 



PART No. 50, APRIL 1902. 

 Papers. 



A. A. Merlin, F.R.M.S. On the Spermatozoon of the Rat (Illustrated) 189 

 A. A. Merlin, F.R.M.S. On the Critical Employment of the Micro- 



scope for Ordinary Working Purposes 195 



H. F. Angus. The Apertometer and its Use, with a Description of 



Two Simple Forms of the Instrument (Illustrated) . . . 209 



F. R. DixoN-NuTTALL, F.R.M.S., and Rev. R. Freeman, M.A. On 



Dlglena rostrata, a new Rotifer (Plate 9) 215 



D. J. ScouRFiELD, F.R.M.S. The Ephippia of the Lynceid Entomo- 



straca (Plates 10, 11, and 12) 217 



W. Wesche, F.R.M.S. Modifications of the Legs in some Dipterous 



Flies (Plates 13 and 14) 245 



C. D. Soar, F.R.M.S. Ucjjoln.'<j;apillo,ws, n. sp. (Plate 15) . . 251 



G. Massee, F.L.S. President's Address : Coprophilous Fungi (Illus- 



trated) 253 



Notes. 



E. M. Nelson, F.R.M.S. The Black and White Dot (Illustrated) . 261 

 G. C. Karop, M.R.C.S. Hanging-Drop Cultivation .... 265 

 A. A. Merlin, F.R.M.S. Minute Structure in some Forms of 



Triceratium ........... 267 



A. Earland. a Plea for a New " Williamson " 268 



Reviews. 



Notices of Calkins's " The Protozoa " ; Michael's '• British Tyro- 

 glyphidae"; Gage's "The Microscope "; Langley's "Practical 

 Histology " ; Bonnier & Leclerc du Sablon's " Cours de 

 Botanique " ; and Chapman's " The Fofaminifera " . . . 271 



Proceedings, etc. 



Proceedings from October 18th, 1901, to February 21st, 1902, inclusive 279 

 Objects Exhibited, with Notes. October 1901 to February 1902 . . 291 



Thirty-sixth Annual Report (for 1901) 296 



Report of the Treasurer (for 1901) . . . . . . .300 



