ORINOIDS. 213 



Scaphiocrinus? sampsoni Miller. 



Scaphiocrinus savipsoni M.\\\ev , 1891: Geol. Sur. Indiana, 17th Ann. Rep., 

 advance sheets, p. 4G, pi. ix, fig. 12. 



A rather small form of the S. missouriensis type. 

 Horizon and locality. — Lower Carboniferous, Chouteau 

 limestone: Sedalia. 



Scaphiocrinus? gorbyl Miller. 



Scaphiocrinus gorhyi Miller, 1891: Geol. Sur. Indiana, 17th Ann. Rep., 

 adv. sheets, p. 46, pi. xii, fig. 15. 



Horizon and localities — Lower Carboniferous, Keokuk 

 limestone: Boonville. 



Scytalocrinus vanhornei (Worthen). 



Plate xxvi, flg. 3. 



Poteriocrinus vanhornei Worthen, 1875: Geol. Sur. Illinois, vol. VI, p. 517, 



pi. xxxi, figs. 2, 3. 

 Scytalocrinus vanhornei Wachsmuth & Springer, 1879: Proc. Acad. Nat. 



Sci., Phila. (Revision, p. 118). 



Crown slender, cylindrical. Dorsal cup obconic ; infraba- 

 sals large; radials about as large as infrabasals, truncated 

 above. Brachials of the first order two, or sometimes only 

 one; arms simple, two to each ray, except the anterior, which 

 has only one, long, slender, rather stout, and made up of some- 

 what wedge-shaped ossicles ; pinnules rather long. Ventral 

 tube cylindrical. Column pentagonal near the calyx, but grad- 

 ually becoming circular below. 



Horisofi and localities. — Lower Carboniferous, Saint Louis 

 limestone: Saint Louis. 



Scytalocrinus dactylus (Hall). 



Graphocrinus dactylus Hall, 1860: Geology Iowa, vol. I, Supp., p. 89. 

 Scytalocrinus dactylus Wachsmuth & Springer, 1879: Proc. Acad. Nat. 

 Sci., Phila. (Revision, p. 117). 



Basals elongated, quite broad. Surface granulose. 

 Horizon and localities — Lower Carboniferous, Saint Loais 

 limestone: Saint Louis. 



