whereas, iti other fishes, this nerve is solely distributed to the in- 

 significant muscles which move the fin of the tail. 



4. The microscopic structure is the same as that of the electrical 

 organs of the Torpedo and Electrical Eel. 



6. The chemical constitution is the same as that of the electrical 

 organs of the Torpedo, consisting of gelatine and albumen, but no 

 fibrin. 



The paper was concluded with a few remarks on the probable 

 uses to the Rays of an electrical organ ; and by directing the atten- 

 tion of naturalists to the probable existence of electrical organs 

 in many soft-bodied fresh and salt water animals, as Polypi, Asterias, 

 &c. 



3. Observations on the Comet, visible now or lately in the 

 Constellation of the A\Tiale. By C. Rumker, Esq. Com- 

 municated by Sir T. M. Brisbane, Bart. 



The following Donations were announced : — 



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the Society. 

 A System of Mineralogy, comprising the most Recent Discoveries. 



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 Report of the Thirteenth Meeting of the British Association of the 



