26 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 76 



Catillocrinus tennesseeae (Troost) Shumard 



Plate 2, figs. 1-22 



Catal. Pal. Foss. Trans. Acad. Sci., St. Louis, II, 1866, p. 358. Wood. Bull. 

 64, U. S. Nat. Mus., 1909, p. 24, pi. 9, figs, i, 2, 3. 



The largest species. Cup truncated above and below, broadly 

 spreading, low hemispheric with convex sides, about three times as 

 wide as high. Base flat, forming an irregularly pentagonal disk 

 mostly covered by the column, projecting unsymmetrically chiefly 

 at left anterior side; composed of two rings of plates, viz., 3 IBB 

 forming a low cone, distinct at the inner floor, but fused externally 

 beneath the column ; and probably 5 BB, of which the sutures are 

 usually obscure or invisible owing to fusion, and only irregularly 

 identifiable. Arms stouter than in other species, being about 1.33 mm. 

 in thickness. RR typical for the genus ; r. post, R has elevated 

 process on left shoulder, supporting triangular anal plate at outer 

 margin, which interlocks inward with first tube plate. Surface 

 strongly pustulose. Material studied, 30 specimens. 



Diam. in 14 specimens, 18-27 i^"^- ! height 7-10 mm. ; arms 43-58. 

 Exceptional specimen smaller. 



Mississippian, New Providence shale; Button Mould Knob, Ken- 

 tucky, and White's Creek Springs, Tennessee. 



Catillocrinus turbinatus n. sp. 



Plate I, figs. 14-17 



Similar to C. tennesseeae, and occurring in the same formation, but 

 probably at a slightly dififerent horizon. It is typically smaller and 

 lacks the rounded contour of that species, the cup being turbinate, 

 with nearly straight sides ; and the base more erect at the sides and 

 projecting above the column all around. Surface smooth or finely 

 granular. It is founded on three good specimens, one a nearly com- 

 plete crown. Two of them are of the minimum size, while the third 

 is much larger, probably a variant from C. tennesseeae. 



Diam. 11-21 mm.; height 5-7 mm.; arms 37-53. 



Horizon and localities the same as those for the last species. 



Catillocrinus wachsmuthi (Meek and Worthen) 



Plate 3, figs, i-ii 



Synbathocrinus (Nematocrinus) wachsmuthi, Proc. Acad. Nat. Sci., Phil., 

 1866, p. 251 ; Catillocrinus zvachsmuthi, Geol. Surv. Ill, III, 1868, p. 465, 

 pi. 18, fig. 5. — Wachsmuth and Springer, Rev. Pal. pt. 3, pi. 5. figs. 15, 16. 



