NEW SPECIES OF CRINOIDS FROM ILLINOIS AND OTHER 



STATES. 



BY S. A. MILLER AND WM F. E. GURLEY. 



SUBKINGDOM ECHINODERMATA. 



CLASS CRINOIDEA. 

 ORDER PAL^BOCRINOIDEA. 

 FAMILY ACTINOCRINID.E. 



BATOCRINUS NODOSUS, n. Sp. 



Plate 7, Fig. 1, azygous side; Fig. 2, opposite view; Fig. 3, 



summit view. 



Body rather above medium size, calyx obconoidal, broadly 

 truncated below, about one- third wider than high; arm open- 

 ings directed nearly horizontally. Plates very tumid, the larger 

 ones subspinous; surface finely granular. 



Basals form an hexagonal disc with slight re-entering angles. 

 The plates are very thick and the cavity for the attachment 

 of the column deep. First radials a little wider than long, 

 three hexagonal, two heptagonal. Second primary radials quite 

 small, quadrangular and from two to three times as wide as high. 

 Third primary radials more than twice as large as the second, 

 rather long, pentagonal, axillary, and bear upon each superior 

 sloping side two secendary radials. The second secondary 

 radials are axillary, and in three of the rays, bear upon each 

 superior sloping side the tertiary radials. In some rays there 

 are two tertiary radials and in others only a single long ter- 

 tiary radial, which gives to each of these rays four arms. The 

 distal side of each ray, adjoining the azygous area, is con- 

 structed in this same way. but the proximal side of each bears 



