IPI YAVIE 12 DK 
Figs. 1-9. Polygnathus pennatus, Hinde. X 20. 
Figs. 10-11. Polygnathus ordinatus, Bryant. X 20. 
Fig. 12. Polygnathus peracutus. Bryant. ~X 18. 
Figs. 13-16. Polygnathus foliatus, Bryant. X 20. 
Originals are from the Conodont bed (Genesee) in Eighteen Mile 
Creek, Erie County, N. Y. 
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