NO. 3 ON THE FOSSIL CRINOID FAMILY CATILLOCRINIDAE 2/ 



Of medium size, maximum individuals being much smaller than the 

 typical minimum of C. tcnncssecae, and the average smaller than the 

 smallest of C. tiirhinatus. Cup broadly spreading as in the former, 

 with rather straight sides as in the latter. Base low, projecting 

 slightly and unequally above the column, chiefly at left anterior side; 

 composed of three unequal BB, distinctly divided in three specimens 

 without any indication of IBB, the interbasal sutures extending 

 without interruption to the axial center ; r. post. R has raised process 

 supporting narrow elongated anal plate, which interlocks with fust 

 tube plate. Surface smooth or finely granular. Eight specimens. 



Diam. 5-12 mm.; height 3-5 mm.; arms 24-39. 



Mississippian, Upper Burlington limestone ; Burlington, Iowa. 



Catillocrinus shumardi n. sp. 



Plate 3, figs. 12, 13 



Similar to last, but uniformly smaller ; 3 BB plates distinctly shown, 

 with no evidence of IBB. Has raised process on r. post. R. Based 

 on four good specimens. 



Diam. 4-6 mm. ; height 2-22 mm. ; arms 20-25. 



Mississippian, Keokuk limestone, lower horizon than next species ; 

 Indian Creek, Montgomery County, Indiana. 



Catillocrinus bradleyi. Meek and Worthen 



Plate 3, figs. 14-17 



Geol. Surv. 111., V, 1873, p. 504, pi. 14, figs, loa, h 



Of medium size. Cup higher and more rounded than in C. wach- 

 smuthi, highest at anterior side. BB 3, unequal, about one-third the 

 height of cup, sutures usually obscure. No IBB. Arms about 

 .45 mm. in width, being the most slender of all species. Large RR 

 proportionally not so large as in preceding species ; r. post. R. has no 

 raised process at outer edge, and no interlocking anal plate, but first 

 tube plate rests directly on radial at same level as arm bases. Anal 

 tube strong and of great length. Surface smooth or finely granular. 

 Column attaining a length of 31-37 cm., with columnals alternating 

 below the proximal enlargement for about one-third its length, and 

 uniform beyond that to near the end, where it tapers to a fine point 

 and bears a few scattering cirri. I have two specimens in which 

 the column is preserved to its full length. Six specimens. 



Diam. 6.5-8 mm. ; height 5-6 mm. ; arms 40-46. 



Mississippian, Keokuk limestone, upper horizon; Crawfordsville, 

 Indiana. 



