no. 5 



TERTIARY ECHINOIDS FROM FLORIDA — KIER 



13 



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10 20 30 40 



DIAMETER IN MILLIMETERS 



Fig. 5. — Arbacia crenulata Kier, new species. Diameter of the peristome rela- 

 tive to the diameter of the test. 



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10 20 30 40 



DIAMETER IN MILLIMETERS 



Fig. 6. — Arbacia crenulata Kier, new species. Diameter of the periproct rela- 

 tive to the diameter of the test. 



