INDIANA PALEONTOLOGY. J74. 



There are six plates in the-aual area of the dorsal cup, a large one below, 

 supporting three above, which in turn support two smaller ones upon their up- 

 per edges. 



The anal tube is nearly central, very strong and composed of convex plates, 

 often spinose. All of the plates are very thick. 



Horizon, locality and collection, same as the last. 



BATOCRINUS ICOSIDACTYLUS, Casseday, Rowley. 



Plate 51. Figs. 19, 20, 21. 



This little specimen has the upper stem joint in place and the same ar- 

 rangement of spines on the vault as in the preceding specimen, twenty arm 

 bases and nearly half an inch of a spine-bearing proboscis. 



Horizon, locality and collection, same as the last. 



BATOCRINUS DAVISI, Var. Sculptus, N. Var. (Rowley). 



Plate 51. Figs. 22, 23. 



The dorsal and ventral cups are of equal depth. 



The colum rather large and the basal plates forming a low rim. 



All of the calyx plates are a little convex with fine radiate-line sculpture, a 

 delicate ridge traversing the radial plates. The fine radiating ridges are often 

 broken up and on some plates display no definite arrangement, crossing some 

 of the radial plates entirely. 



The radial plates are wider than long and the radial series embraces three 

 orders of plates. 



The interradial series contains four plates, 1, 2, 1, the lower one being the 

 largest plate in the dorsal cup. 



The anal area has eight plates, 1, 3, 3, 1. 



The plates of the ventral disk are smooth and convex, some of them having 

 a low, nipple-like central node. 



The anal tube is not very strong and located near the center. 



There are eighteen arm bases, the anterior ray having but two. 



The ornamentation of the dorsal cup of this form will readily distinguish it. 



Horizon, locality and collection, same as the last. 



BATOCRINUS ICOSIDACTYLUS, Casseday, Rowley. 



Plate 51. Figs. 24, 25, 26, 27, 28. 

 Figure 24 is, perhaps, nearly a full length proboscis or anal tube of this 



