| Porocrinus conicus L.Verulam/U. Bobcaygeon Formation Brechin, Ontario, Canada Size: 2 cm crown This is probably the rarest crinoid to be found at the Brechin area quarries. | 
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| Porocrinus conicus L.Verulam/U. Bobcaygeon Formation Brechin, Ontario, Canada Size: 2 cm crown This is probably the rarest crinoid to be found at the Brechin area quarries. |
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