NEW SPECIES OF CRINOIDS FROM ILLINOIS AND OTHER 



STATES. 



BY S. A. MIT.LER AND WM P. E. GURLEY. 



SUBKINGDOM ECHINODERMATA. 



CLASS CRINOIDEA. 

 ORDER PAL^OCRINOIDEA. 

 FAMILY ACTINOCRINID^. 



BATOCRINUS NODOSUS, 11. Sp. 



Pldle I, Fig. 1, azygous side: Fig. 2, oppoaile view; Fig. 3, 



sHtnmit view. 



Body rathor abovo nn-diiim sizf, calyx obr-onoulal, Uroadly 

 tnmcatod below, about fnic lbii-(l -wider than hio-h; arm oi)on- 

 iiiiifs diroctod nearly horizontally. Plates vei-y (iiiiiid, the laru'cn- 

 oii(;s subspinous; surface linely <,'ranulai'. 



BasaLs form an hexagonal disc with sligiil n'-entei-iuio; 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 hcptagonal. Second primary radials quite 

 small, quadrangular and fi-om two to three times as wide as high. 

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

 rather long, pentagonal, axillary, and Ijear upon each su])erioi' 

 sloping side two socendary radials. 'J'he second secondary 

 radials are axillary, and in three of the rays, beai' ui)on (vach 

 superior .slo])ing side the tertiary radials. In some I'ays there 

 are two tertiary radials and in others only a. singl(> long ter- 

 \\wry I'adial, which givt's to each ol' tliese rays lour arms. The 

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

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



