CRINOIDS. 181 



Batocrinus aequibrachiatus (McChesnby). 



Actinocrinua aequibrachiatus McCheeney, 1860 : Dcsc. New Palae. Foss., p. 25. 

 Actinocrinus asteriacus Meek & Worthen, 1860: Proc. Acad. Nat. Sci., 



Phila., p. 385. 

 Actinocrinus cequibrachiatus, var. alatus Hall, 1861 : Boston Jour. Nat. Hist., 



vol. VII, p. 263. 

 Actinocritius asteriscus Meek & Worthen, 1866 : Geol. Sur. Illinois, vol. II, 



p. 207, pi. XV, tigs. 8a-c. 

 Actinocrinus cequibrachiatus McChesney, 1867: Trans. Chicago Acad. 



Sci., vol. I, p. 18. 

 Batocrinus cequibrachiatus Meek & Worthen, 1873 : Geol. Sur. Illinois, 



vol. V, p. 368. 



Calyx flattened, extended laterally into five broad radial 

 lobes. 



Horizon and localities. — Lower Carboniferous, Burling- 

 ton limestone : White Ledge ( Marion county ). 



Batocrinus trohiscus Meek & Worthen. 

 Platexxiii, flg. 5. 



Batocrinus trohiscus Meek & Worthen, 1869 : Proc. Acad. Nat. Sci., Phila., 



p. 354. 

 Batocrinus trohiscus Meeks & Worthen, 1873 : Geol. Sur. Illinois, vol. V, p. 



372, pi. V, fig. 6. 



Of the type of B. christyi, but calyx larger, much more 

 depressed, and very much broader. 



Horizon and locality. — Lower Carboniferous, Burlington 

 limestone : Sedalia. 



Batocrinus christyl (Shumard), 



Actinoc7nnus chriatyi Shumard, 1855: Geol. Sur. Missouri, pt. ii, p. 191, 



pi. A, fig. 3. 

 Batocrinus christyi Keek i& Worthen, 1873: Geol. Sur. Illinois, vol. V, 



p. 367, pi. V, figs. 4a-b. 

 Batocrinus chrisiyi Wachemuth & Springer, 1885: Proc. Acad. Nat. Sci., 



Phila., pi. V, fig. 6. 

 Batocrinus altiusculus Miller & Gurley, 1894: Illinois State Museum Nat. 



Hist., Bui. 3, p. 20, pi. V, figs. 1-3. 



Calyx large, turbinate; dorsal cup twice or thrice as high 

 as ventral side ; otherwise much like B. pyriformis, but with 

 two arms from every opening instead of one, and the anal tube 

 nearly smooth. 



