RECORDS OF MEETINGS 93]^ 



Caricella subangulata Conrad ^ 



Cyprcea lapidosa Conrad I 



Pleurotomaria sp? ^Claibornian 



Turritella mortoni Conrad I 



Foraminifera — Oligocene 



Cycloceypens sp? Carpenter ^ 



Nodosaria cf . bacillum de France I 



OrUtoides mantelli Wicksburgian 



Polystomella crispa I 



Eehinodermata — Oligocene 



Amphidetus ruspatangus ] 



Cassidulus raveneli Twitchell I 



Clypeaster rogeri Morton |- Vicksburgian 



Echinolampus aldrichi Twitchell I 



Pelecypods — Oligocene 



Cardiuni sp ? "1 



Cardium eversum Conrad Ivicksburgian 



Chama lyelli Dall I 



Area umbonata Lamarck "j 



€hama chipolana Dall I 



Chama tampcensis Dall I 



Cardita shepardi Dall jAppalacbicolan 



Cardium delphicum Dall 



Pecten cMpolanus Dall 



Tellina chipolana Dall 



Gastropods— Oligocene 



AmpulUna flscheri Dall 



Clonus suridens Conrad 



Phasionella ammicoloides 



Strompus aldrichi Dall |> Vicksburgian 



Stromhus n. sp I 



Turritella mississippiensis Conrad I 



Cerithium plectrum Dall "1 



Murex cf. mississippiensis Conrad /-Appalachicdlan 



Turritella mediocoustriata Dall I 



From this list it will be noticed that except for the echinoderm Lin- 

 thia alabamensis Clark, which is Midway an, basal Eocene, all of the 

 ■other forms are Upper Eocene and Lower Oligocene. The Arecibo lime- 

 stone, the rocks from which the specimens were collected, is thus both 

 Upper Eocene and basal Oligocene in age. The Collazo shale which un- 

 derlies the Arecibo limestone is Upper Eocene in age. 



