JOUENAL 



OV THB 



EOYAL MICROSCOPICAL SOCIETY. 



VOL. II. No. 1. 



PAQB 



CONTENTS. 



Tbansactions of the Society — 



I. On CEcistks umbella and other Rotifers. By C. T. 



Hudson, M.A., LL.D., V.P.R.M.S. (Plntes I. and 11.) 1 

 II. A Further Inquiry into the Limits of Microscopic Vision 

 and the delusive application of Fraunhofer's Optical 

 Law of Vision. By Dr. Roy^ton-Pigott, M.A., F.E.S., 



&c. (Plate III.) 9 



III. On some Recent Forms of Camera Lucida. By Frank 



Crisp, LL.B., B.A., Sec. R.M.S., &c 21 



IV. Description of a New Form op Camera Lucida. By J. 



Cunningham Russell, M.D., Lancaster .. .. ,. 25 



V. Immersion Illuminators. By J. Mayall, jun., F.R.M.S. ,. 27 

 VI. Note on a Revolver Immersion Prism for Sub-stage 

 Illumination. By James Edmunds, M.D., M.E.C.P. 



Lond., F.R.M.'^., &c 32 



VII. A Catoptric Immersion Illuminator. By John Ware 



Stephenson, F.R.A.S., Treas. R.M.S 3o 



VIII. The Thallus of the Diatomace.e. By F. Kitton, Hon. 



F.R.M.S. .. 38 



Notes and Memoranda .. .. .. .. ,. .. 41 



Sesearches on the Proboscis of Butterflies 41 



Contributions to our hnowledge of the Protozoa 42 



Cochineal for Staining 43 



• Prazmowslii's Heliostat 44 



New {Auditory^ Sense-organs in Insects. (Plate IV.) 45 



The Fibrillae of Filifera 49 



The Ovule 49 



Laboratory for Microscopic Work .. 52 



A Neio Micrometer .. 52 



" Cell-Soul and Cellular Psychology " 53 



Post-embryonic Formation of Appendages in Insects 55 



The Wehr Slide 55 



ITie form of the crystalline Cones in tJie Arthropod Eye ' .. ^6 



Poison Glands of the Centipedes .. 57 



Microbia 58 



Orchella as n Staining Material -"'^ 



