260 PROCEEDINGS OF THE SOCIETY. 



made therefrom showed the red, orange, yellow, and green, as dense black 

 patches, which effectually masked any attempt by the artist to reproduce 

 the correct colours. He then exhibited a number of slides of macro- 

 scopical as well as microscopical subjects, by means of which he contrasted 

 the effects produced by colouring lantern slides made from ordinary 

 plates with those prepared from panchromatic plates, and showed the 

 wide possibilities which were opened up to the skilful artist. In con- 

 clusion, he referred to the difficulties which confronted the artist when 

 colouring even the most perfect lantern slides — difficulties which had 

 been met by the preparation of perfectly transparent colours that would 

 not scratch the film, would not fade, and would not run together in the 

 finished plate. 



At the conclusion of the demonstration, the President complimented 

 Mr. Spitta and his co-worker the artist on the beauty of the specimens 

 exhibited, and proposed a most hearty vote of thanks to Mr. Spitta for 

 his exhibits and for his clear demonstration of them. 



The vote of thanks was carried unanimously. 



Mr. Rousselet read a paper on " The Fourth List of New Species of 

 Rotifera since 1889, with Bibliography." This is published in full in 

 the Journal of the Society. 



The President congratulated Mr. Rousselet very cordially on the 

 continuation of his many years' work on the Rotifers, which was of 

 great value and of the most accurate and distinctive character. 



The thanks of the Society were cordially voted to Mr. Rousselet for 

 his paper. 



The President called attention to the Roll Book, and requested any 

 Fellow present who had not already signed, to do so. 



The next Meeting of the Society was announced for March 20. 



The following Instruments, Objects, etc., were exhibited : — 



The Society : — Slide of Navicula socialis, presented by Professor T. 

 Chalkley Palmer. 



New Fellows : — The following were elected On?mar«/ Fellows of the 

 Society : — Seabury Edwardes and Samuel Glover. 



