ACTINOCRINID.Z. 85 
Steganocrinus globosus W. and Sp. (nov. spec.). 
Plate LXI. Fig. 6. 
Calyx almost perfectly globose ; the distichals a little projecting so as to 
give to the section a very slightly pentangular outline; the interspaces be- 
tween the rays wide, but not depressed as usual in this genus; the plates 
nearly flat, and apparently without ornamentation. 
Basals small, disk-like, and following the general curvature of the calyx. 
Radials and costals slightly decreasing in size upward, all one third wider 
than high; the first costals hexangular; the second generally heptangular. 
Of the distichals only one row is preserved, but its plates not being axillary 
they were followed by another row horizontally disposed, as their facets are 
directed outward. There are two openings above, ‘which apparently represent 
the inner cavity of the two ambulacral appendages; they are large and close 
together. Regular interbrachials: 1, 2, 2, 3, followed by the plates of the 
tegmen. Anal side much wider, the anal plate, which is as large as the 
radials, supporting 2, 8, 6, and 6 or 7 plates above. Ventral disk hemi- 
spherical, as high as the dorsal cup ; composed of numerous almost flat pieces 
of nearly uniform size; the ambulacral pieces arranged in two rows, which 
branch on the disk. Anal tube somewhat excentric and rather small. 
Horizon and Locality. — Oolitic bed of the Kinderhook group; Burling- 
ton, Iowa. 
Type in the collection of Wachsmuth and Springer. 
Remarks. — The unique specimen from which this species is described 1s 
not sufficiently perfect to indicate positively its generic relations. It agrees, 
however, in all essential characters with Steganocrinus, and we regard it as an 
early, not fully developed form of that genus. 
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