( 2 ) 



JOUKNAL 



OP THE 



EOTAL MICEOSCOPICAL SOCIETY. 



Ser. 2.— Vol. III. Part 2. 



(APRIL, 1883.) 



CONTENTS. 



Transactions of the Society — 



lY. — Five New Flosoules ; with a Note on Peop. Leidy's Genera 

 OF AcYOLUs AND DiCTYOPHORA. By C. T. Hudson, LL.D., 



r.E.M.S. (Plates III. and IV. and figs. 31 and 32) .. .. 1^] 

 v. — The President's Address. By Prof. P. Martin Duncan, M.B. 



Lond., r.RS 172J 



VI. — The Action of Tannin on the Cilia of Infusoria, with 

 Eemarks on the use of Solution of Sulphurous Oxide in 



Alcohol. By Henry J. Waddington. (Figs. 33 and 34) .. 185| 



Summary of Current Eesearches relating to Zoology and 

 Botany (principally Invertebrata and Cryptogamia), Micro- 

 scopy, &c., including Original Communications from Fellows 



AND others 189| 



Zoology. 



Development of the Ovum of Arvicola arvalis 189j 



Formation of the Emhryonic Layers in the Trout , 1£' 



Distinctions between Organisms and Minerals . . 190^ 



Development of Eeproductive Organs of Pulmonate Mollusca 192 



DeveU^mental History of the FrosdbrancMata 192 



Norwegian Buecinidas 193 



Sinisigera 193 



Green Colour of Oysters 194 



Suclcer on the Fin of the Heteropods not a Sexual Characteristic 194 



Growth of the Molluscan Shell , . . . . 195 



Individual Variation in Ascidians . . . . 195 



Gemmation in Didemnidse and Botryllidse 196 



Anatomy and Histology of Ciena intestinalis 196 



Mediterranean and Atlantic Bryozoa 198 



Colour and Pattern of Insects .. .. ,. .. 198 



Development of the Excretory Generative Ducts in Insects 204 



Anatomy and Development of the Ovary in Dipfera 205 



Systematic Characters of the Lahrum of Syrphidie 205 



Genital Organs of the Orthoptera 205 



Male Genital Appendages of the Saltatory Orthoptera 206 



Circulation of Blood in the Larva of Hydrophilus (Fig. 35) 208 



Ventral Organ of GeopMlus .. .. 209 



Polymorphism and Parthenogenesis in Acari 210 



Trombidium fuliginosum .. .. 211 



Ecdysis of Apodemes in Crustacea 211 



Blind Copepod of the Family Harpacticidse 212 



Mode of Application of the Suclcers of the Leech 212 



Spermatogenesis in the Nemeriinea 213 



Filidium-Stage of a Nemertine 213 



J 



