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Mr. Edwards exhibited, on behalf of Mr. R. Adkin, the fossil 

 guard of a Belemiiite, Beleumites nitidns, from Swindon, where it 

 occurs commonly, in the Kimmeridge clay (Jurassic Epoch). 



These cephalopods have a funnel, and behind this a small bag 

 with a tube which leads to the funnel ; this bag is filled with a 

 carbonaceous substance which, as known in living Ce/iJwlopoda, 

 can be ejected in the form of a dark ink, which serves to obscure 

 the water, and protect the animal in its tlight from an enemy. 

 The ink bag is often found in these fossils, and its contents can 

 still be used as a pigment (sepia). 



