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S 56 p. Dark colored, impure limestone, in layers three to ten 

 Inches thick. Shells of large Stropheodonta near the middle. .3 ft., 6 in. 



Atrypa reticularis c, 

 Camaroplioria gainesi r, 

 Chonetes mxicronatiis a, 

 Leptaena rhomboidalis c, 

 Leptostrophia pcnplana r, 

 Lingulodiscitut? sp. r, 

 Pholidostrophia iowensis r, 

 Productella spinulicosta r, 

 Rhipidotnella vatiuxemi c, 

 Schizophcria propinqua r, 



Spirit er acuminatus r, 

 Spirifer sp. r, 

 Spirifer varicosus r, 

 Stropheodonta conca7-a c, 

 Strwph-eodonta demissa r, 

 Stroph-eodonta patersoni r, 

 Stropheodonta inaequistriata : 

 Tentaculites scalariformis r, 

 Goinphoceras sp. r 



S 56 q. Dark gray, somewhat shaly limestone, in layers six to 

 eleven inches thick 2 feet, 8 inches. 



Camarophoria gainesi r, 

 Chonetes yandellanus c, 

 Pholidostrophia iowensis r, 

 Productella spinulicosta a, 

 Rhipidomella tiiia r, 

 Sdhisophoria propinqua r, 



Spirifer cf. segmentus r, 

 Spirifer gregarius var. r, 

 Strophalosia truncata r, 

 Paracyclas elliptica c, 

 Gomphoceras sp. r 



S 56 r. Gray to dark drab, somewhat shaly limestone, in layers 

 two to eight inches thick 6 feet. 



Camarotoechia horsfordi r, 

 Chonetes konickianus c, 

 Chonetes yandellanus c, ' 

 Productella spinulicosta r, 

 Rhipidomella lizna c. 



Spirifer varicosus c, 

 Strophalosia truncata r, 

 Stropheodonta concara r, 

 Paracyclas elliptica r 



S 56 s. Gray limestone, in rather thick, imperfectly separating lay- 

 ers, composed largely of shells of Chonetes 1 foot, 7 inches. 



Chonetes yandellanus a, 

 Pholidostrophia iowensis r, 

 Spirifer gregarius var. r, 



Spirifer sp. r, 

 Aviculopecten terminalis r, 

 Paracyclas elliptica r, 

 Gomphoceras sp. r. 



S 56 t. Dark colored, impure limestone, composed largely of shells 

 of Chonetes 1 foot, 2 inches 



Chonetes konickianus c, Productella spinulicosta r, 



Chonetes yandellan/us a, Paracyclas elliptica r. 



S 56 u. Gray to dark colored, somewhat shaly limestone. .. .2 feet. 



Atrypa aspera c, 

 Camarotoechia horsforkli c, 

 Chonetes yandellanus a, 

 Cyrtina hamiltonensis r, 

 Leptostrophia perplana r, 

 Pholidostrophia iowensis c, 

 Productella spinulicosta r, 

 Schizophoria propinqua c, 



Spirifer gregarius var. r, 

 Spirifer peiiextensus c, 

 Spirifer varicosus c, 

 Strophalosia truncata r, 

 Stropheodonta concava c, 

 Stropheodonta inaequistrictta r, 

 Paracyclas elliptica c, 

 nellcrofhon pclops r. 



S 56 V. Gray, impure limestone 2 feet, 3 inches. 



Nucleocrinus sp. r, 

 Atrypa reticularis r, 

 Atrypa aspera r, 

 Chonetes pusillus c, 

 Leptostrophia perplana r, 

 Pholidostrophia iowensis c, 

 Rhipidomella penelope r, 



Rhipidomella zanuxemi c, 

 Rhipidomella sp. r, 

 Spirifer perextensus r, 

 Spirifer varicosus c, 

 Strophalosia trtincata c, 

 Stropheodonta concava r, 

 Paracyclas elliptica r. 



