Bobcaygeon Formation Cystoid Plate

Pleurocystites squamosus (Parseley, 1982 (?)), Amecystis laevis (Raymond, 1921).

There are at least 10 specimens of cystoids here, 6 Amecystis leavis and 4 Pleurocystites squamosus. The cystoids are either complete or partials. 

Upper Bobcaygeon Formation, Middle Ordovician. James Dick Quarry, Gamebridge, Simcoe County, Ontario, Canada.

Piece is 21 cm in length and 18 cm tall.