We 
FOLKESTONE 
NATURAL HISTORY SOCIETY. 
PROCEEDINGS. 
NINETEENTH SESSION, 1886—1887. 
Octroser 12TH, 1886. 
The first meeting of the Session was held at the Town Hall, but 
owing to the great inclemency of the weather, the audience was not 
so large as usual. A highly interesting lecture was given by Dr. 
Gorham of Tunbridge, on ‘“ The Colours of Leaves in their relation 
to White Light.” It was illustrated by numerous diagrams, and 
by experiments with the Colour Top. A vote ofthanks was warmly 
accorded to the lecturer. 
2 Novemser 161s, 1886. 
__ The following paper, prepared by Dr. Thomas Eastes, was read 
_ by the Secretary, the writer being confined to his house by illness. 
ON SPONGES. 
Mr. President, Ladies and Gentlemen,—I ask your attention to- 
night whilst I say a few words about Sronezs: a group rather low 
in the animal kingdom, with a remarkable diversity of minor 
