( 694 ) 
PROCEEDINGS OF THE SOCIETY. 
The first Conversazione of the Session was held at 20, Hanover 
Square, on Monday, the 1st December, 1890. 
The following objects, &c., were exhibited : — 
Mr. J. Badcock : — MegalotrocJia albo-flavicans. 
Pond Life. 
Pev. G. Bailey : — Foraminifera from the Bed Chalk. 
Mr. C. Baker : — Dr. Dallinger’s pattern Microscope Lamp. 
E. Leitz’s Microscope and Microtome. 
Photomicrographic Microscope as suggested by Mr. Andrew 
Pringle. 
Portable Limelight Projection Lantern and Slides of Micro- 
organisms. 
C. Reichert’s Apochromatic Objective 1/3 N.A. *50. 
C. Zeiss’s Apochromatic Objective 1/8 N.A. *95; Microscopes; 
and Abbe’s Achromatic Condenser. 
Mr. W. I. Chapman : — Limnias annulatus. 
(Ecistes crystallinus and intermedins. 
Mr. H. E. Freeman : — Group of Foraminifera from Porto Seguro. 
Casts of Foraminifera from Colon. 
Mr. J. E. Ingpen : — Contrast in effects in objects mounted in Air, 
Canada balsam, Oil of Anise, Styrax, Piperine, Bisulphide of Carbon, 
Chloride of Tin, Bromide of Antimony, Phosphorus, Sulphide of 
Arsenic, and Platina deposit. 
Mr. R. Macer: — LopJiopus crystallinus. 
Stephanoceros EicJiornii. 
Mr. C. J. Martin : — MegalotrocJia albo-flavicans. 
Pond Life. 
Mr. A. D. Michael; — Trans. Sect, of a Mite ( Gamasus terribilis) show- 
ing the whole body filled with Nematoid worms. 
Serial Sections of Acarina cut in a Swiss hotel with a common 
Cathcart microtome and an ordinary shaving-razor. 
Mr. E. M. Nelson : — Zeiss’s Apochromatic Objective 1/6 N.A. *95. 
Messrs. Powell and Lealand : — Triceratium favus with an Apochromatic 
Oil-immersion 1/12 N.A. 1*40. 
Upper valve of Pleurosigma balticum with an Apochromatic 
Oil-immersion 1/8 N.A. 1-40. 
Mr. B. W. Priest: — Fossil Sponge, CceloptycJiium agaricoides. 
Mr. A. Pringle : — Photomicrographic Apparatus. 
Mr. C. Rousselet: — Pond Life in Winter: Collection of Rotifers obtained 
from under the ice. 
Mr. G. J. Smith : — Chiastolite Schist, Gefrees, Fichtelgebirge. 
Granulite, with Kyanite, Saxony. 
Ottrelite Schist, Ottrez, Ardennes. 
Pikrite, Inchcolm. 
Mr. W. T. Suffolk: — Bordered Pits — Deal, 1/4 in.; with spherical 
Lieberkuhn. 
