CONTENTS. vii 



PAGE 



D. J. ScouRFiELD, F.R.M.S. Synopsis of the Known Species of 



British Fresh-water Entomostraca. Part J. Cladocera (Plate 24) 431 



G. Massee, F.L.S. President's Address : Fermentation and Putrefac- 

 tion , 455 



Notes. 



C. D. Soar, F.R.M.S. On the Occurrence of Living Hydrachnid 



Larvae in the Stomach of a Trout. (IHustrated) .... 4G3 

 G. W. KiRKALDY. On the Phototropism of Bai)lm\a .... 405 



Reviews. 



Notices of Cross & Cole's " Modern Microscopy " ; Pringle's " Prac- 

 tical Photo-Micrography"; Bagshaw's "Elementary Photo- 

 Micrography " ; Miall's " Natural History of Aquatic Insects " ; 

 "Subject List of Works on General Science, Microscopy, etc., in 

 the Library of the Patent Office "; Rheinberg's " Common Basis 

 of the Theories of Microscopic Vision " ; and " Knowledge " (1902) 467 



Proceedings, etc. 



Proceedings from October 17th, 1902, to February 20th, 1903, inclusive 474 



Objects Exhibited, with Notes. October 1902 to February 1903 . 487 



Thirty-seventh Annual Report (for 1902) 492 



Report of the Treasurer (for 1902) 49G 



PART No. 53, NOVEMBER 1903. 



Papers. 



R. T. Lewis, F.R.M.S. On an undescribed Species of Chelifer 



(Plate 25) 



G. C. Karop, F.R.M.S. Pocket Magnifiers. (Illustrated) . 



K. I. Marks, F.R.M.S., and W. Wesche, F.R.M.S. Further Observa 



tions on Male Rotifers (Plate 2G) . . ^ . 

 W. H. Harris. Remarks on the Emission of Musical Notes and on 



the Hovering Habit of Eristalis tenax 



S. PiovANELLi. Two New Bdelloida commensal in the Branchial 



Cavities of Telplmsa flnviatilis ...... 



D, Bryce. On Two New Species of Philodina (Plate 27) . 



D. J. ScouRFiELD, F.R.M.S. Synopsis of the known Species of British 



Fresh-water Entomostraca. Part II. Copepoda . 

 A. Ashe. Photography of Cavities in Minerals, etc. (Plate 28) . 



497 

 499 



505 



513 



521 

 523 



531 

 545 



