U. S. GEOLOGICAL SURVEY 



New Jersey 



Manasquan . 





50' 



Rancocas ■ 



IZ5' 1 





Monmouth - 

 200' 



?*!■ 



Matawan - 

 220 ' 



r 



Magothv . 

 ioo' 





Raritan . 

 zoo' 





- Exogyra costata Say 



-Exogyra costata var. cancellata var. nov. 



1 Exogyra ponderosa Roemer 



PROFESSIONAL PAPER 81 PLATE XII 



Texas 



Navarro 

 500' 



Taylor 



500' 



|_J_ var. cancellata var. nov. 



Austin 



550' 



(a) Including nonchalky equivalents in ea 

 Alabama, western Georgia, northern I 

 sippi, and western Tennessee 



(6) Tombigbee sand member of Eutaw ft 



Eagle Ford 

 soo' 



Woodbine 

 400' 



-Exogyra costata Say 



Exogyra costata 



- Exogyra po-nderosa Roemer 



