I 



INDIANA PALEONTOLOGY. J72. 



mented by short, irregular raised lines and pits of a most delicate character. A 

 slight raised line connects the radial plates. 



The radials are wider than long, and there are two bifurcations to the ray 

 in four radial rays. 



The first interradial is larger and supports two smaller plates above. 



The basal plates form a rim. The column is rather large and the perfora- 

 tion round. 



The ventral disk is as deep as the dorsal cup, and the plates are nodose- 

 spinose. 



The anal tube is central and strong and probably nodose. 



The first plate of the anal interradius supports three plates above, and 

 ■above them are three others. 



Horizon, locality and collection same as last. 



This specimen was originally described from the Kaskaskian limestone. 



BATOCRINUS CRASSITESTUS, N. Sp., (Rowley.) 

 PLATd 51. Figs. 10, 11, 12. 



This crinoid is subglobose, with a deeper ventral disk than dorsal cup. 



The broad plates form a distinct rim and, as in the preceding forms, the 

 radial plates are convex and wider than long and slightly connected by a low 

 line. There are two bifurcations to the ray except in the anterior ray. 



The large first interradial plate is nine or ten sided, convex, with indistinct 

 lines radiating from its center. Above it are one or two smaller convex plates. 



The first anal interradial is twice as wide as long, and supports three larger 

 convex plates above. Upon these three plates rest two other plates of nearly 

 equal size. A small plate lies above these two. 



There are eighteen arm bases in five groups, with two respiratory pores to 

 the group, or ten in all. 



The plates of the ventral disk are strongly nodose, almost spinose, but 

 ^itli no definite arrangement to the nodes. 



The proboscis or ventral tube is subcentral and very strong, also nodose. 

 The body plates are all thick. 



Horizon, locality and collection same as the last. 



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



Plate 51. Figs. 13, 14, 15. 



In this crinoid the depth of the dorsal cup and the ventral disk are about 

 the same. 



