U. S. GEOLOGICAL SURVEY 



PROFESSIONAL PAPER 81 PLATE XI 



A. SPECIMENS OF EXOGYRA COSTATA, EXOGYRA COSTATA VAR. CAN- 

 CELLATA (NUMEROUS), GRYPH/EA VESICULARIS, ANOMIA ARGENTARIA, 

 AND OTHER FOSSILS, WEATHERED FROM SELMA CHALK AT "BALD 

 KNOB," JOSEPH REYNOLDS PLACE, 3 MILES WEST OF CORINTH, 

 ALCORN COUNTY, MISS. 



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SPECIMENS OF EXOGYRA PONDEROSA, EXOGYRA PONDEROSA VAR. 

 ERRATICOSTATA (NUMEROUS), GRYPH/EA AUCELLA, AND OTHER 

 FOSSILS, WEATHERED FROM BASAL BEDS OF SELMA CHALK NEAR 

 PUBLIC ROAD, 1 MILE WEST OF COTTON GIN PORT, MONROE 

 COUNTY, MISS. 



