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WEDNESDAY, JANUARY 12th, 1898. 



1897— A SCIENTIFIC RETROSPECT. 



BY 



Mr. EDWARD ALLOWAY PANKHURST. 



THURSDAY, FEBRUARY 10th, 1898. 

 (In the Aet Room, Municipal School of Art.) 



SOME POLYZOA OF THE COAST 



(IlLUSTEATED BY LaNTEEN SlIDES). 

 BT 



Dr. H. S. GABBETT (of Eastbourne). 



The paper, which was illustrated by a number of photo- 

 micrographs shown by the lantern, described the characteristics 

 and affinities of Polyzoa in general, and gave a detailed account 

 of the structure of the following species, common on the coast 

 of the neighbourhood : — Grisia Ehurnea, Diastopora Patina, 

 Idmonea iSerpens, Flustrella Eispida, Membranipora Pilosa, M. 

 Lacroixii, Flustra Foliacea, F. Papyracea, Gellaria Fistulosa, 

 Gellepora Pumicosa, Mucronella Goccinea, Microporella Ciliata, 

 Scrupocellaria Scniposa, Bugula Flabellata, Bicellaria Giliata. 



Special attention was directed to the appendages of the 

 Polyzoan colony, — spines, vibracula, " birds'-head bodies," and 

 ocecia ; and many photographic illustrations were exhibited. 

 The paper concluded with a brief account of the n inute structure 

 and functions of the tentacles, alimentary canal, and muscular 

 system ; and photomicrographs were shown, representing various 

 diatoms which form a large part of the food of polyzoa, and 

 which are constantly found in the stomachs of these animals. 



