CRINOIDS. 183 



Horizon and localities. — Lower Carboniferous, Upper Bur- 

 lington limestone : Ash Grove, Sedalia, Rocheport, Hannibal, 

 Palmyra, LaGrange ; Quincy (Illinois); Bonaparte (Iowa), Bur- 

 lington (Iowa). 



Batocrinus subtractus ( White). 



Actinocrinus nashviUce, var subtractus White, 1863: Proc. Boston Soc. 



Nat. Hist. vol. IX, p. 16. 

 Batocrinus nashviUce, var. subtractus Wachsmuth & Springer, 1881 : Proc. 



Acad. Nat. Sci,, Phila., vol. XXXEII, p. 341. 

 Batocrinus brittsi Miller, 1892: Geol. Sur. Indiana, 18th Ann. Rep., adv. 



sheets, p. 33, pi. v, figs. 21-23. 



Calyx very much smaller than in B. nashvillw, and not as 

 coarsely constructed ; the ventral tube proportionally very 

 much larger and longer, spinous. 



Horizon and localities. — Lower Carboniferous, Burlington 

 limestone : Hannibal. 



Batocrinus dodecadactylus (Mbek & Worthen). 



Actinocrinus dodecadactylus Meek & Worthen, 1861: Proc. Acad. Nat. 



Sci., Phila., p. 131. 

 Batocrinus dodecadactylus Meek & Worthen, 1868: G-eol. Sur. Illinois, 



vol, II, p. 205, pi. XV, tigs. 3a-c. 



Calyx like B. rotundus, but only one-third as large, and 

 with only twelve arms. 



Horizon and localities. — Lower Carboniferous, Upper Bur- 

 lington limestone : White Ledge (Marion county). 



Batocrinus nashvillae (Troost.) 



Actinocrinus nashviUce Troost, 1850 : Proc. Am. Ass. Adv. Sci., p. 60. 

 Actinocrinus nashviUce Hall, 1858: Geol. Iowa, vol. I, p. 609, pi. xv, fig. 



4 ; pi. xvi, figs 4a-b 

 Batocrinus nashviUce Meek & Worthen, 1873: Geol. Sur, Illinois, vol. V, 



p. 368. 

 Batocrinus nashviUce Worthen, 1890: Geol. Sur. Illinois, vol. VIII, p. 85, 



pi. xiii, fig. 5. 



Calyx very large, somewhat turbinate, lobed ; contracted 

 below, rapidly expanding to the arm region ; ventral side drawn 

 out into a monstrous anal tube, which, near the middle, has a 

 ring of long, heavy spines, radiating outward, horizontally. 

 Eadials, ventral, and occasionally other, plates more or less 

 nodose centrally. 



