320 PROCEEDINGS OF THE SOCIETY. ' 



Mr. Crisp thought that those Fellows who saw the slide of Para- 

 mcecium exhibited by Mr. Waddington would be struck by the very 

 extraordinary appearance it presented. 



Mr. Ingpen inquired if Mr. Waddington had been able to mount 

 the Infusoria, and what medium would be likely to prove the best 

 chemically for the purpose. 



Mr. Waddington thought he should prefer dense gelatine, but no 

 doubt a great deal of washing would be requii'ed previously in order 

 to get rid of the tannin. 



Mr. Badcock asked if Mr. Waddington could account for any 

 difference between the action of the acid on the cilia of the Para- 

 mcecium and the setai of other Infusoria. 



Mr. Waddington said he could not explain the difference, except 

 that possibly the setse being thicker might require a longer exposure 

 to the action of the tannin. 



Mr. Stewart thought the explanation would probably be found in 

 the difference of development of the cuticular layer which in some 

 species was much thicker than in others ; the more exposed bodies of 

 the Paramcecia would cause them to succumb almost at once to the 

 action of the acid. 



Mr. Webb's paper " On Diamond and other Jewel Lenses for the 

 Microscope " was taken as read. 



The following Instruments, Objects, &c., were exhibited : — 



Prof. Bell : — 19 slides from the Naples Zoological Station. 



Mr. T. Christy : — Seed of Protea cynaroides. 



Mr. Crisp: — (1) Abbe's Condenser for small stands. (2) Gund- 

 lach's Substage Refractor. (3) Gundlach's Symmetrical Illuminator. 

 (4) Chevalier's Camera Lucida for vertical Microscoj)es. 



Mr. Groves : — New Frog-plate. 



Messrs. How & Co. : — Pocket Lamp. 



Mr. G. Massee: — Germinating Spores of Agariciis (Mycena) epi- 

 pterygiiis. 



Mr. J. Mayall, jun. : — Dr. S. P. Thompson's Polarizing Prism. 



Mr. T. Powell:— l-12th in. Oil-immersion Objective 1-47 N.A., 

 the front being set in the usual way, without a thin plate of glass. 



Dr. J. Eae : — Slide of Diatomaceous deposit from Barbadoes. 



Mr. Waddington : — Infusoria treated with Tannin. 



New Fellows : — The following were elected Ordinary Felloivs : — 

 Messrs. George W. Carter, M.A., George F. Chantrell, William 

 Saunders, and William Stanley. And as ex-officio Fellow the President 

 for the time being of the Carlisle Microscoj)ical Society. 



Walteb W. Reeves, 



Assist.-Secretary. 



