210 CRINOIDS. 



Barycrinus stellatus (Troost). 



Cyathocrinus stellatus Trooet, MS. 



Cyathocrinus stellatus Hall, 1858: Geol. Iowa, vol. I, p. 623, pi. xvi, figs. 



3-8. 

 Cyathocrinus quinquelobus Meek & Worthen, 1SG5 : Proc. Acad. Nat. Sci., 



Phila., p. 150. 

 Cyathocrinus quinquelobus Meek & Worthen, 1868: Geol. Sur. Illinois, vol. 



Ill, p. 519, pi. XX, figs. 6a-b. 

 Barycrinus stellatus Wachsmuth & Springer, 1879: Proc. Acad, Nat. Sci., 



Phila. (Revision, p. 103.) 



Like B. spurius, but with large nodosities on the basal 

 plates. 



Horizon and localities. — Lower Carboniferous, Keokuk 

 limestone: Boonville, Ourryville ( Pike county ) ; Keokuk 

 (Iowa). 



Barycrinus rhombiferus (Owen & Shumard) . 



Poteriocrinus rhomhiferus Owen & Shumard, 1850: Jour. Acad. Nat. Sci., 

 Phila., C 2), vol. II. 



Poteriocrinus rhomhiferus Owen & Shumard, 1852: U. S. Geol. Sur. Wis- 

 consin, Iowa and Minnesota, p. 595, pi. 5B, figs. 2a-c. 



Barycrinus rhomhiferus Wachsmuth & Springer, 1879: Proc. Acad. Nat. 

 Sci., Phila. (Kevision, p. 103.) 



A small, obconical form with the sutural depressions very 

 marked. 



Horizon and localities — Lower Carboniferous, Burling- 

 ton limestone : Louisiana. 



Barycrinus magnificus Meek & Worthen. 



Plate xxvi, flg. 4. 



Barycrinus magnificus Meek & Worthen, 1868: Proc. Acad. Nat. Sci., 



Phila., p. 340. 

 Barycrinus magnificus Meek & Worthen, 1873: Geol. Sur. Illinois, vol. V, 



p. 483, pi. xii, figs. 2a-b. 



Calyx very large, often having a diametric measurement 

 of five or six centimeters; massive. Surface covered with 

 small tubercles. 



Horizon and localities. —how er Carboniferous, Keokuk 

 limestone : Keokuk ( Iowa). 



