So......this stumps me on four levels (not a hard thing to do ) One- it is "sunken" into the shale (Stark Shale between Winterset and Bethany Falls limestone (Pennsylvania); Two-it is cracked ( at the 7th segment/ridge), Three- how do I get this out? and Four- what is it? It does not appear to be a crinoid is my best guess! I sealed it with a very dilute solution of butvar but not sure next steps. Thanks all!! Bone