cxxu 



GEOLOGICAL AND PALEOKTOLOGICAL DELATIONS 



Explanation ok Ciiauts of DrsTurnuTiox. 



Tlie following charts contain only those Mollnsca of the Maryland 

 Miocene which are found in regions outside of the State or which range 

 below or above tiie horizons from which they have been described in this 

 report. The charts have been arranged as follows : 



Column 1 gives the range in depth in terms of fathoms for the genera, 

 sub-genera, species or varieties placed opposite. A zero indicates that the 

 species occurs at low water mark. When no depth is given it is believed 

 that the form inhabits shallow water near shore or between high and low 

 tide. Cohmm 2 gives their extreme northern range, and column 3 their 

 extreme southern range so far as it is known. In the columns from 4 to 15, 

 inclusive, are shown the conditions under which the forms were found. 

 An asterisk (*) indicates that the form was picked up on the beach or 

 secured between high water and fifty fathoms. A dagger (t) indicates 

 that the form comes from fifty to eight hundred fathoms. When a dagger 

 and asterisk are both })resent, in some locality tlic form was found or sup- 

 posed to exist in both shallow and deep \\'ater. 



Columns 16 to 38, inclusive, show the geological horizons in which the 

 various formations have been found in regions outside of Maryland. 



When an X is placed in the column, it indicates that the form has been 

 reported from the horizon, but no locality given. 'J'hc numbers refer to 

 the various localities of which the followinu- is the kov: 



LIST OP LOCALITIES. 



1. Alabama. 



2. Alaska. 



3. Alligator Creek, Florida. 



4. Alum Bluff, Lower Bed, Chattahoo- 



chee River, Florida. 



5. Alum Bluff, Upper Bed, Chattahoo- 



chee River, Florida. 



6. Antilles. 



7. Archer, Florida. 



8. Artesian Well, Galveston, Texas, 

 n. Ashley Phosphate, S. C. 



10. Atlantic City Well, N. .1. 



11. Bailey's Ferry, one mile below Chi- 



pola River, Florida. 



12. Ballast I'oint, Tampa Bay. Florida. 



13. Bartow, Florida. 



14. Bellefleld, Va. 



15. Bowden, .Tamalca. 



10. Bridgeton, N. .1. 



17. Cainhoy, S. C. 



18. Caloosahatchie River, Florida. 



19. Cape Fear River, N. C. 



20. Cape May Well, N. J. 



21. City Point, Va. 



22. Cocoa Post Office, Choctaw Co., 



Alabama. 



2.3. Coggins Point, Va. 



24. Costa Rica. 



2.5. Creole Bluff, Grant Parish, La. 



26. Crosswicks, N. J. 



27. Cumberland Co., N. J. 



28. Darlington, S. C. 



29. De Leon Springs, Florida. 



30. Dinwiddle, York River, Va. 



31. Dismal Swamp, Va. 



32. Duplin Co., N. C. 



