Ser. 2, Vol. 8, No. 48.] APRIL, 1901. [Price 38. 6d. net. 



THE JOURNAL^^-.tll^" 



OP THE ^ "T^V ^--' / 



QUEKETT MICROSCOPICAL CLURj; I 



EDITED BY 



D. J. SCOURFIELD, F.R.M.S. 



(^Itwill he understood tJcat the Autkors alone are rexponuUefor the vieivs and 



oinnions expressed in their papers.) 



PAGE 

 1 



7 



13 



25 

 29 



CONTENTS. 

 X APERS 



■ A. A. Merlin, F.R.M.S On the Eesolution of Amphipleura pellucida, etc., 

 with a Dry Lens and Axial Illumination ^ ^ i . > 



C. F. RoussELET, F.E.M S. On the Specific Characters 'of Asplanchna 

 intermedia, Hudson (Plate 1) . /^ «^ «/. 



J. RHEiNBERG, F.R.M.S. The Origin of certain Colour Phenomena 'typi-* 

 CBlly shovfnhj Actlnocyclus Ralf sit. (Illustrated) 

 li- ^I^ON-NUTTALL, F.R.M.S. On Diaschiza ventHpes-B. New Rotifer*. 

 (Plate 2) 



^' Z' ^^^^^^^- Oil a New Rotifer, Cathjima ligo'na (Plate 2) ' ' 



G. W KiRKALDY F.E.S. The Stridulating Organs of Waterbugs (Rhyn- 



chota), especially of Corixidae (Plates 3 and 4) . . * ^ -^ ^^ 



C. D. Soar, F.R.M.S. An unrecorded Hydrachnid found in North Wales 



(Plate 5) ^- 



D. J. SCOURFIELD, F.R.M.S. TheEphippiumof^o.m^7^a (Plate*6) ' ' 51 

 G. Massee, F.L.S. President's Address . . . . . , [57 



Notes. 



E. G. Wheler. a remarkable Stigmatic Organ in the Nymph of Ornitho- 



doros megni7i% (Illustrated) . g, 



J. Rheinberg F.R.M.S. A New Arrangement * for View'ing DiflEraction 



Spectra (Illustrated) ^ ^ go 



C. D Soar, F.R.M.S. The Occurrence of Larval' Water-Mites on various 



Aquatic Animals (Illustrated) .... 65 



Note on Some Portable Microscopes (Illustrated) 67 



Notices of Recent Books 



Reviews. 



75 



Proceedings, Etc. 



Proceedings from October 19th, 1900, to February 15th, 1901, inclusive . 85 



Ir^^l «5.u . ^^'A^*^ ^^^^^- August 17th, 1900, to February 15th, 1901 . 100 

 Ihirty-fifth Annual Report of the Committee (for 1900) 104 



Report of the Treasurer (for 1900) .... ' ' " * 108 

 List of Members, etc i to* ^^^^j 



••••••••• 





HonHon : 



[Published for the Club] ^ 



WILLIAMS AND NORGATE, 

 14, HENRIETTA STREET, COVENT GARDEN, LONDON. 

 and 20, SOUTH FREDERICK STREET, EDINBURGH. 



