Here is the fossil Pleurocystites cystoid from the Ordovician of Ontario, Canada. Its a decent specimen. 

Name: Pleurocystites squamosus

Locality: Bobcaygeon fm, Ontario, Canada

Fossil Size: Cystoid measures about 5.5 cm long on matrix measuring 12 x 11 cm 

Age: Ordovician

Feel free to ask questions!

Returns accepted within 7 days of arrival for refund of purchase price but not refund of shipping. Returns have to be sent also via priority mail with delivery confirmation and insurance.

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