182 CRINOIDS. 



Horizon and localities. — Lower Carboniferous, Upper Bur- 

 lington limestone: Ash Grove, Rocheport (Boone county), 

 Louisiana, Palmyra. 



Batocrinus pyriformis (Shumaed.) 



Plate xxiii, flg. 7. 



Aciinoerinus piriformis Shumard, 1855: Geol. Sur. Missouri, Ann. Rep., 



pt. ii, p. 192, pi. A, figs. 6a-b. 

 Batocrinus pyriformis Meek and Worthen, 1873: Geol. Sur. Illinois, vol. 



V, p. 375, pi. V, fig. 5. 

 Batocrinus pyriformis Keyes, 1890: Am. Naturalist, vol. XXIV, p. 254, 



pi. viii, fig. 1. 



Calyx large, obpyriform ; contracted and lengthened 



toward the basal region ; ventral side somewhat inflated, with 



tuberculose plates ; anal tube twice as long as the arms, more 



or less spinous. 



Horizon and localities. — Lower Carboniferous, Upper 



Burlington limestone : Helton, Hannibal, Louisiana, Palmyra, 



Ash Grove. 



Batocrinus laura (Hall). 



Plate xxiii, flg. 8. 



Actinocrinus laura Hall, 1861: Desc. New Species Crinoids, p. 15. 

 Batocrinus laura Wachsmuth <fe Springer, 1881: Proc. Acad. Nat. Sci., 



Phila. vol. XXXIII, p. 341. 

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



Hist., Bui. 3, p. 23, pi. V, figs. 7-9. 



Like B. rotundus ( Yandell & Shumard), but has the dorsal 

 cup obconic in shape, and the ventral side much more de- 

 pressed. 



Horizon and localities. — Lower Carboniferous, Upper 

 Burlington limestone : LaGrange ; Quincy ( Illinois ). 



Batocrinus rotundus (Yandell & Shumard). 

 Plate xxiii, figs. 6a-t) 



Actinocrinus rotundus Yandell & Shumard, 1855: Geol Sur. Missouri, 



Ann. Rep., pt. ii, p. 191, pi. A, figs. 2a-b, 

 Actinocrinus ohlatus Hall, 1860: Supp. Geol. Iowa, p. 38. 

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



p. 367. 



A sperical form with smooth plates. Arms when preserved 

 are very short and slender. 



