26 



and about the same size. It is followed by three large plates, the 

 middle one of which is much elongated and unites with the plates of 

 the vault. 



Vault pyramidal by reason of the depressed interradial areas, 

 nearly as large as the calyx, and bears a central proboscis. It is 

 covered by convex, polygonal plates. 



This species bears little or no resemblance to any other fifteen- 

 armed species. When compared with B. rusticellus above de- 

 scribed, it will be seen that it bears sixteen arms and that neither 

 the azygous area nor any of the interradial areas connect with the 

 vault, while this species bears fifteen arms and all the areas arc 

 widely connected with the vault. A close inspection shows a differ- 

 ence in structure in nearly all respects. Like differences will be 

 found when compared with other species. 



Found by the veteran collector, R. A. Blair, to whom science is so 

 much indebted for unremitting labor, in the Burlington Group, near 

 Sharon, in the Southwestern part of Missouri, and now in the col- 

 lection of S. A. Miller. 



BATOCRINUS EOTULIF( )HMIS, U. Sp. 



Plate J, Fig. 26, basal view magnified two diameters; Fic/. 27, same 

 natural size. Plate 11. Wig. 1, azygous view; 

 Fig. £, sit hi in if view. 



Species below medium size, biturbinate, wheel-shaped. Calyx 

 curving outward from the base to the arms, more than twice as wide 

 as high. No radial ridges, but the radial series are lobed and pro- 

 ject at the margin so as to notch the circumference at the inter- 

 radial spaces. Plates convex and finely granular. Ambulacral 

 openings directed slightly above an horizontal line, not visible in a 

 basal view, but may be seen in a summit view. No ovarian pores de- 

 tected, and probably they open through the first arm plate. 



Basals form a short hexagonal disc five times as wide as high, 

 notched at the sutures, and having an hemispherical depression 

 for the attachment of the column. First primary radials not as 

 large as the second and third together, about twice as wide as long, 

 three hexagonal and two heptagonal. Second primary radials 

 quadrangular, from three to five times as wide as long. Third 

 primary radials about one half larger than the second, four hexa- 

 gonal, one heptagonal, axillary, and the ray opposite the azygous 



