Plat. 



690 



Platycrinus siluricus, Hall, Trans. Alb. Inst. X, abstract, 

 p, 9, 1879; Collett's Indiana report of 1881, p. 

 256, plate 15, fig. 15, base of calyx, showing its 

 large strong plates, which are nearly flat in the 

 middle, and abruptly depressed into the sutures ; 

 jS! surface granulose, granules long, winding and 

 flowing together. Waldron, O. Niagara. K 5. 



Platycrinus yandelli, Owen & Shumard, Geol. Wisconsin, 



etc., 1852, plate 5A, fig. 6, from 

 Buflijigton limestone^ Iowa ; 

 subcarboniferous. — XI. 



Qw. c>y.; 



Platycrinus ? Kecognized by J. Hall in specimen 807- 



38. 



Platygonus compressus, J. LeConte. Collett's Indiana 

 Keport of 1884, p. 20, pi. 1. An extinct peccary from the salt- 

 petre cave in Kentucky. — Human era ? 



Platygonus vetus, Leidy, Proc. Acad. Nat. Sc. Phila. 1883, 



•r-rT'J-^-pi*^ 



Ic'A^ 



