720 PROCEEDINGS OF THE SOCIETY. 



Apochromatic Oil-immersion, N.A. 1-40, and Apochromatic Oil- 

 immersion Condenser, N.A. 1 • 40. 



Mr. B. W. Priest : — Polyzoa, &c., recent and fossil. 



Messrs. A. Pringle and E. M. Nelson : — Photomicrograplis of Bacteria, 

 Physiological preparations, Diatoms, &c., exhibited with the Oxy- 

 hydrogen Lantern. 



Mr. C. Eousselet : — (1) Notops hracMonus. (2) BracMonus pala. 

 (3) BracMonus argularis. (4) Triarihra longiseta, &c. 



Mr. G. J. Smith :— Basalt (Eowley Eag), with contemporaneous vein of 

 more acid rock, Eowley, Staffordshire. Enstatite Diabase, Pen- 

 maenmawr. (2) Hornblende Porphyrite (altered Andesite), Old Eed 

 Sandstone conglomerate, Stonehaven, Scotland. Polarized light. 

 (3) Olivin Dolerite, Enitellan, Scotland; fissures in Olivin filled 

 with secondary Magnetite. (4) Pitchstone, Island of Ponza; in 

 state of tension. Polarized light. 



Mr. T. F. Smith:— (1) Abbe Diffraction Plate with central stops. 

 (2) Photographs of Diatom structure. 



Mr. W. T. Suffolk : — Circulation in Anacharis alsinastrum. Oil -immersion 

 1/12 in. 



Mr. W. H. Tyas : — Series of Histological Slides prepared by Mounting 

 Section of the Manchester Microscopical Society. 



Mr. J. J. Vezey: — (1) Larva of Echinus (Pluteus). (2) Arhacia 

 pustulosa. 



Messrs. W. Watson and Sons :• — (1) Pollen and sexual organs of Scarlet 

 Lychnis. (2) Type slide of Diatoms from Simbirsk. (8) Kidney 

 of Snail. (4) Meibomian glands in human eyelid. (5) Seed of 

 Maize, showing Embryo, Endosperm, &c. (6) Tentacle of Cuttle- 

 fish showing suckers in vertical section. 



