837 



Ptycho 



Ptychophyllum knappi. {PtycJiophyllum versiforme, 



vni, a. 



in part, 

 Hal], 35th 

 Et. N. Y. 

 State Mus. 

 Nat. Hist. 

 1882.) Col- 

 lett's Indi. 

 anna Rt. 

 1882, page 

 278, plate 

 18, fig. 14, 

 side of 



a short, 

 and broad 

 specimen ; 

 15, longer, 



irregular 

 one; plate 

 25, fig. 6, 

 the cup of 

 the coral 



showing 



PI iS. ^^^ strong 

 * and coarse 



rays; 7, another cup with the rays partly obliterated by sili- 

 cification. Coal Orchard, Ky. Corniferous limestone. Villa. 



