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in substance, and has a root like a Tubularia, or base be- 
ginning with a stem that divides into branches, widening 
into many rows or series of cells, which are somewhat 
concealed by curving inwards. The outer side is glossy, 
only divided by slight furrows into rows, showing its trans- 
parency with a magnifier. The cells somewhat resemble 
articulations, and are alternate in their position. 
I think this production may lead us to understand some 
petrifactions found in Somersetshire. 
Since writing the above, MissBiddulph of Southampton 
has sent us a piece of this Flustra found at Dover. 
