176 CBINOIDS. 



Eretmocrinus depressus Keyes. 



Plate xxlii, fig. 11. 



Calyx of medium size. Dorsal cup about as high as wide ; 

 basals very large, massive, concave below, and forming a thick- 

 ened projecting rim; radials about twice as wide as high; 

 costals very small, the first quadrangular, thrice as wide as high, 

 the second slightly larger, pentagonal. Ventral side rather low, 

 made up of large nodose plates. 



Horizon and localities — Lower Carboniferous, Lower Bur- 

 lington limestone : Hannibal. 



Eretmocrinus carica (Hall). 



Actinocrinus carica Hall, 1861: Desc. New Species Crinoids, p. 10. 

 Batocrinus (Eretmocrinus) carica Meek & Worthen, 1873 ; Geol. Sur. Illinois, 



vol. V, p. 368 

 £re!!mocrinM5 carica Wachsmuth & Springer, 1881 : Proc. Acad. Nat. Sci., 



Phila., p. 346. 



Horizon and localities. — Lower Carboniferous, Lower Bur- 

 lington limestone : Sedalia. 



Eretmocrinus coronatus (Hall). 



Actinocrinus coronatus B-SlW., \S%0 : Geol. Iowa, vol. I, Supp., p, 28. 

 Eretmocrinus coronatus Meek & Worthen, 1875: Geol. Sur. Illinois, vol. 



V, expl. to pi. X, figs. 8-8b. 

 Eretmoc7'inus coronatus Wachsmuth & Springer, 1881 ; Proc. Acad. Nat. 



Sci., Phiia., p. 347. 



Calyx small, subglobose, flattened below. Dorsal cup 

 broad, with a wide base ; plates elevated centrally. Plates of 

 the ventral side subspinous. 



Horizon and localities. — Lower Carboniferous, Lower Bur- 

 lington limestone: Louisiana. 



Eretmocrinus leucosia (Hall). 



Actinocrinus leucosia Hall, 1861 : Boston Jour. Nat. Hist., vol. VII, p. 261. 

 Eretmocrinus leucosia Wachsmuth & Springer, 1881 : Proc. Acad. Nat. Sci., 



Phila., p. 347. 

 Dorycrinus confragosus Miller, 1891: Geol. Sur. Missouri, Bui. 4, p. 



34, pi. v, figs. 12-13. 



A large stout form with very heavy, somewhat convex 

 plates. 



Horizon and locality. — Lower Carboniferous, Burlington 

 limestone : Sedalia. 



