EXPLANATION OF PLATE XLIII. 



Figures 1-4 and 9-29 are copied from Jones. 



Figs. 1-3. Kloedenella pennsylvanica (Jones). 



Left side, end and ventral views of complete carapace, X 15. 



4. Klaedenella hallii (Jones). 

 A right valve, X 20. 



5. Kloedenella clarkei paupera, new variety. 

 Lateral view of left valve, X 20. 

 Coeymans limestone, Cumberland, Maryland. 



6,7. Kloedenella turgida, new species. 



Right and left valves, respectively, X 20. 

 Coeymans limestone, Cumberland. Maryland. 

 S. Klwdenella turgida ventrosa, new variety. 

 Lateral view of a left valve, X 20. 

 Coeymans limestone, Cumberland, Maryland. 

 9,10. Kloedenella bicaesa (Jones and Kirkbyi. 



Left and right valves of this Carboniferous species. X 25. 

 11-14. Kirkbyina reticosa (Jones and Kirkby). 



11. Left valve. X 25. 



12. Right valve. X 25. 



13, 14. Dorsal and ventral views of a complete carapace. 

 15-18. Kirkbyina ventricomis (Jones and Kirkby). 



15. A left valve, X 25. 



16. A right valve showing the spine more conspicuously, X 25. 

 17. is. Ventral and end views of complete carapace. 



19,20. Beyrichiella cristata Jones and Kirkby. 



Right side and dorsal view of complete carapace, X 25. 



21. Beyrichiella confluens (Ulrich). 



Left valve. X 20, of the only known American species. 

 22-24. Beyrichiopsis fimbriate Jones and Kirkby. 



22. Right valve. X 40. apparently perfect. 



23. Right valve with the fringe partially broken away. X 25. 



24. Ventral view of complete carapace. 



2."i. Beyrichiopsis subdentata Jones and Kirkby. 

 Lateral view of a rijjht valve, X 25. 

 26,27. Beyrichiopsis granulata Jones and Kirkby. 



26. A left valve, X 25. 



27. End view of same. 



28. Beyrichiopsis simplex Jones and Kirkby. 

 Lateral view of left valve, X 25. 



29. Beyrichiopsis comuta Jones and Kirkby. 

 Left valve, X 25. 



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