210 



PROCEEDINGS OF THE ACADEMY OF 



P. papyratia. 



Kecent. Florida, etc. 



P. decnssata. 



Kecent. Western 

 Central America. 



P. dussumieri. 

 Recent. China. 



P. ficus. 

 Recent. 



East Indies. 



P. reticulata. 



Recent. East Indies. 



P. reticulata. 



Recent. Cargados 

 Islands. 

 P. tessellata. 



Recent. Rosemary 

 Islands, Australia. 



P. papyratia. 



Recent. Florida, etc. 



P. papyratia caloosa- 

 hatchiensis. 

 Pliocene. Florida. 

 P. papyratia. 



Waccamaw Pliocene. 

 South Carolina. 



P. pilsbryi duplinensis. 

 Miocene. North Caro- 

 lina. 

 P. pilsbryi. 



Oligocene (or Mio- 

 cene). Jamaica. 



P. mississippiensis. 

 Oligocene. V i c k s - 

 burg. Miss. 



P. filia. 



Eocene. J a c k s[o n, 

 Miss. 



Table I. 



[May, 



6 



Table II. 



P. condita. 

 Miocene, 

 France. 



Dax, 



P. pilsbryi. 



Oligocene (or Mio- 

 cene). Jamaica. 



P. carbaseaC!). 



Oligocene (or Mio- 

 cene). S. Domingo. 



P. mississippiensis. 

 Oligocene. Vicksburg, 



Miss. 



Table III. 



