| Megistocrinus regularis Alpena Limestone Alpena, Michigan Size: The crinoid calyx is about 3.5 cm across. Note the holdfast attached to the tegmen. Price: $50 US ID number: f1164 | 
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| Megistocrinus regularis Alpena Limestone Alpena, Michigan Size: The crinoid calyx is about 3.5 cm across. Note the holdfast attached to the tegmen. Price: $50 US ID number: f1164 |
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