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59 
drop by drop, this had the effect of killing the creatures with the 
tentacles expanded. 
A discussion ensued on the nature and purpose of the bird’s head 
processes, in which several gentlemen present took part, and the 
meeting became a Conversazione, at which some very beautiful 
examples of Polyzoa and Anthozoa were exhibited by Dr. Hattirax 
and Messrs. SmweLt, R. Guaisyer, and WonrFor. 
Mr. Wonror also exhibited specimens of Polyzoa and Anthozoa 
mounted on paper, tv show the form of the Polypidom. 
Dr. Hatuirax exhibited a very ingenious’ hygroscope, which 
registered the slightest difference of mvisture in the atmosphere, con- 
structed out of an awn of an Erodiwm, stork’s-bill. 
