Keywords: Petrificata derbiensia Erismolithus.jpg s of petrifactions By William Martin - Fossil coral The original a Madrepora compound fasciculate Stirps cauliform or stalk like round somewhat branched striated slightly in a longitudinal direction flex uose and in some parts coalescent The stars are terminal turbinato concave and reticulated http //books google co uk/books id 5EIAAAAAQAAJ ots 5020cBeiDI dq petrificata 20derbiensia pg PR81 v onepage q f false William Martin 1809 PD-old-100 Derby Museum and Art Gallery William Martin naturalist Fossil Erismothalus |