8 



the furrows belonging to the quaternary series of radials, and at 

 the inferior angles of these elongated plates there are pores pene- 

 trating the vault, making, in all, forty of these so-called ovarian 

 orifices. 



This species is distinguished by its general form, sharp radial 

 ridges, tumid and nodose plate?, and twenty-six arms. It is not 

 necessary to make any special comparison with any heretofore de- 

 scribed. 



Found by Prof. A. G. Wetherby in the Keokuk Group, in 

 Allen County, Kentucky, and now in the collection of Wm. F. E. 

 Gurley. 



BATOCEINUS CASULA, n. sp. 



Plate I, Fig. 7, azygous view; Fig. 8, side view of the same 

 specimen, part being broken away opposite the azygous side 



Species large, calyx and vault subequal in size. Calyx one-half 

 wider than high, bowl-shaped, most rapidly expanding above the 

 secondary radials, and ambulacral openings directed nearly hori- 

 zontally. Radial ridges angular and in the tertiary and quater- 

 nary series embracing the entire plates to the lateral sutures, 

 and each plate bears a central node. All the plates of the calyx 

 are tumid and each bears one or more nodes. Surface granular. 

 Column large. 



Basals short, twice as wide as high, bear a tubercle at each side, 

 and form a low hexagonal disc, one-half wider than the column, 

 each superior face concave and lateral sutures deep. First primary 

 radials of unequal size, from one- half wider to twice as wide as 

 long, superior face transverse or slightly concave, three hexagonal, 

 two heptagonal and each bears a central node, and the larger ones 

 have small lateral nodes. Second primary radials comparatively 

 small, quadrangular, and about one-half wider than high. Third 

 primary radials about one-half larger than the second, pentagonal, 

 axillary, and support on each upper sloping side two secondary 

 radials, and in one of the rays in our specimen there are three 

 secondary radials. The secondary radials are larger than the 

 second and third primaries, and the last one is axillary in all the 

 rays. Above this some of the rays are injured in our specimen. 

 The lateral ray shown in figure 8 has four tertiary radials upon 

 each upper sloping side of the last secondaries which gives to 

 this ray four arms. The ray shown on the right of the azygous 

 area in figure 7 has four tertiary radials on each of the upper 

 proximal sides of the second secondaries, and two tertiary radials 

 on each of the upper distal sides, the last of which is axillary 

 and supports upon each upper side three quaternary radials, 



