910 PROCEEDINGS OF TIIE SOCIETY. 



Messrs. Laing, Wharton, and Down : 



Electric Microscope Lamp with adjustable stand. Primary Battery 

 capable of maintaining light (5 candles) for over six hours, 

 and Secondary Battery capable of maintaining light for over 

 100 hours. 

 Mr. J. Mayall, jun. : 



Barton's Buttons and Iris Ornaments, shown with electric lamp. 

 Mr. A. D. Michael : 



The newly discovered Nymph of Tegeocranus ccplieiformis. 

 Mr. E. M. Nelson: 



Navicula californica, N. Lyra var., and Araclinoidiscus (1/G in. 

 objective, dark-ground with binocular). 

 Messrs. Powell and Lealand : 



Ami'Mpleura pellucida with 1/12 in. oil-immersion 1*5 N.A. and 

 oil-immersion condenser : illuminated with the electric light 

 as arranged by Laing, Wharton, aud Down. 

 Mr. B. W. Priest : 



Japanese Sponge (Farrea occa), showing veil of spicules. 

 Mr. G. J. Smith : 



Limestone with diatoms (Isle of Moss, Jutland). Doleritc (Upsala, 

 Sweden). Syenite. Diorite ? (Hodries, Hungary). 

 Mr. J. H. Steward : 



Spicules of Gorgonia. Head of Plumed Gnat. Fructification of 

 Fern. 

 Prof. C. Stewart : 



Stridulating Organ of Crawfish, Palinurus vulgaris, and of 

 Sphserotlierium. 

 Dr. J. T. Thompson : 



Microscopical Drawings from Pathological Specimens. 

 Mr. A. Topping: 



Section of Head of Lamprey, double-stained. Web of Foot of Frog, 

 injected. 

 Mr. W. B. Turner : 



Sea-spider (Pycnogonium littorale $ ). 

 Messrs. W. Watson and Sons : 



Camera or Lantern Microscope. New Type Slide of 100 Diatoms. 

 Arranged Slide of Diatoms, Chirodota, Synapta, &c, and Type 

 Slide of 50 Foraminifera. Crystals of Brucin. Jaw of Kitten, 

 showing displacement of temporary and development of per- 

 manent teeth. Grape-vine Blight (Phylloxera). 

 Mr. B. B. Woodward : 



Longitudinal section of Ceriihium rugosum Wood. 



The second Conversazione of the Session was held on the 

 6th May, 1886. 



The following Objects, &c, were exhibited : — 



Mr. C. D. Ahrens : 



New Polarizing Prism. 

 Mr. J. Badcock : 



Steplianoceros, Stentor, and Plumaiella. 



