39 



Found by R. A. Blair, in the Burlington Group, at Sedalia, 

 Missouri, and now in the collection of S. A. Miller. 



BATOCRINUS PRODIGIALIS, n. Sp. 



Plate III, Fig. 4, basal view; Fig. 5, azygous side; Fig. 6, 



summit view. 



Species very large and wonderfully strong, nearly four times 

 as wide as high. Exceedingly rough, by reason of the plates 

 being produced in wedge-shaped, transverse nodes. The radial 

 series are prolonged beyond the interradial areas leaving the 

 circumference deeply notched between the arms. Column round 

 at the calyx, large and pierced by a round columnar canal. 



Basals short, projecting in cuneiform edges and expanding 

 below the end of the column, and beveled at the sutures, so 

 as to give the base an hexagonal outline. The basal disc is 

 about twice as wide as the diameter of the column. The circle 

 for the attachment of the column is only slightly concave and 

 is radiately furrowed at the margin. First radials full twice 

 as wide as high, three hexagonal, two heptagonal. Second 

 primary radials, less than half as large as the first, quadran- 

 gular, and more than twice as wide as long. Third primary 

 radials a little larger than the second, short, pentagonal, 

 axillary and support on each upper sloping side two secondary 

 radials, the last of which is axillary and bears the tertiary 

 radials. In each of the radial series, there is upon one of the 

 upper sloping sides of the last secondary radial a single ter- 

 tiary radial which is axillary and bears upon each upper side 

 quaternary radials, which gives to each ray five arms. 

 In each radial series there are three or four tertiary 

 radials and where the last tertiary radial is axillary there 

 are upon each upper sloping side three quarternary radials. 

 There are, therefore, twenty- five ambulacral openings to the 

 vault. They are all directed horizontally so as to leave deeply 

 notched interradial areas that connect with the vault. 



Interradial areas elongated and covered with four plates. The 

 first one is large and nearly as long as wide; it is followed by 

 two plates in the second range and one in the third that connects 

 with the plates of the vault. In the azygous area there are 

 twelve plates. The first one is in line with the first primary 

 radials and somewhat smaller; it is followed, in the second range, 

 by three plates, in the third range by four plates, and in the 



