Bulletin 4 



118 



Arkansas: Hot Springs coimty, Pulaski county, 

 Lonoke county , Jackso7i and Indepetidence counties — 16-17. 



Tennessee: Crainesville and vicinity, Middleton 

 and vicinity 18-22. 



Mississippi: Walnut and vicifiity, Ripley ajid 

 vicinity, Pontotoc and vicinity 22-25. 



Alabama: Black Bluff section, Naheola, Prairie 

 Bhff and vicinity, Midway, Matthews' Landing. 

 Sfiow Hill a7id vicinity, 'Allenton and Oak Hill and 

 vicinity, Troy and vicinity, Clayton and vicinity .;,• 25-36 



Georgia: Ft. Gaines and vicinity 36-37 



Additional Remarks and Deductions 38-44 



Nonconformability: Texas, Arkansas, Tennes- 

 see, Mississippi, Alabama, Georgia 38-40 



Correlations made 40-43 



Variation of faunas 43-44 



PART II. PAI,BONTOI,OGY 45 156 



Description op the Molluscan Remains of 



THE Midway Stage 45-125 



Pelecypoda 45-72 



Scaphopoda 73 



Gastropoda 74-121 



Cephalopoda 122-125 



Plates and Explanations 127-158 



-:o: 



Preliminary Considerations. 



Divisions of the :^ocene. 



The Eocene series of our Southern States has been provision- 

 ally sub-divided as follows: — 



6. Vicksburg stage. 



5. Jackson stage. 



4. Claiborne stage. 



3. Lower Claiborne stage. 



2. Eignitic stage. 



I. Midway stage. 



Eocene S£;ries - 



