JOURNAL 



or THS 



EOYAL MICROSCOPICAL SOCIETY. 



Ser. 2.-V0L. III. Part 6. 



(DECEMBER, 1883.) 



CONTENTS. 



Transactions of the Societs — 



PAGX 



XIII. — On some kew Cladocera of the English Lakes. By 



Conrad Beck. (Plates XL and XH.) 777 



XIV. — On an Improved Method op Preparino Embrtological 



AND OTHER DeLICATE ORGANISMS FOR MICROSCOPICAL EX- 

 AMINATION. By Edward Lovett ,. 785 



XV. — The Eelation of Aperture and Power in the Microscope 



(continued). By Professor E. Abbe, Hon. F.E.M.S 790 



XVL — On a New Camera Ltjcida. By Dr. Hugo Schroder. (Figs. 



152 and 153) 813 



XVII. — On " Optical Tttbe-length " ; an Unconsiderbd Element 

 in the Theory of the Microscope. By Frank Crisp, 



V.P.L.S., Sec. E.M.S. (Fig. 154) 816 



Summary of Current Eesearches relating to Zoology and 

 Botany (prlncipally Inyertebrata and Cryptogamia), Micro- 

 gcoPY, &c., including Original Communications from Fellows 



AND others 821 



Zoology. 



Development of Mussle-Jibres and their Unionwith Nervet 821 



Cell Theory 822 



Xanthochroism of Parrots 825 



Origin of the Individuality of Higher AnimaJs 825 



Occurrence of Chlorophyll in Animals 826 



Klein's ^Elements of Histology' 827 



Colouring Matters of Bile 827 



I Anatomy of the Marine Bhipidoglossa 828 



Existence of a Shell in Notarchus 830 



Differences between the Males and Females of the Pearly Nautilus . . . . 830 



Structure of Tunicates 830 



Altexation of Ascidian Ova .. 831 



Flight of Insects 832 



Antennary Bods of Vanessa lo 832 



Studies on the Myriopoda 832 



Development of Peripatus 833 



Pentastoma Lari 835 



Eesearches on the Isopoda 835 



Moulting of the Sliell in Limulus 836 



Development of Annelids 837 



Pleurochxta moseleyi 839 



Anatomy and Histology of LumbriciUus variegatus 840 



Anatmny of the Hirudinea 841 



Spadella marioni .. .. 843 



Neio Nematoid .. .. 843 



Mule of Oxyuris curvula 843 



