CONTRIBUTIONS 



Tertiary Fauna of Florida, 



WITH ESPECIAL REFERENCE TO THE 



MIOCENE SILEX-BEDS OF TAMPA 



AND THE 



PLIOCENE BEDS OF THE CALOOSAHATCHIE RIVER. 



WILLIAM HEALEY DALL, A. M., 

 Paleontologist to the U. S. Geological Survey. 



PART I. 



PULMONATE, OPISTHOBRANCHIATE AND 

 ORTHODONT GASTROPODS. 



