12 Cincinnati Society of Natural History. 
Delocrinus hemisphericus, (Poteriocrinus hemisphericus) Shu- 
mard, Trans. St. Louts Acad. Sci, Vol, 1, p: 220.) piigoe renee 
genus. | 
Delocrinus inflexus, (Cyathocrinus inflexus) Geinitz, Carb. und 
Dyas in Nebraska, p. 62, Pl. IV., Figs. 20a, b, c, and doubtless 
the spines and some of the plates and fragments of columns figured 
on the same page under the name of Actinocrinus sp. The spines 
figured by Meek in the Report on the Paleontology of Eastern 
Nebraska, Pl. V., Figs. 2a, 2b: and 2c, under the mame om Zea. 
crinus mucrospinus probably belong to this species, while the form 
Fig. 1 called Scaphiocrinus (?) hemisphericus may be distinct. 
Delocrinus missouriensis n. sp. And very doubtfully the Eriso- 
crinus planus of White above referred to. 
DELOCRINUS HEMISPHERICUS, SHUMARD. / 
flate [f., Fig. 8, side view showing azygous plate and first brachial, 
with spine; Fig. 9, basal view of same; Fig. 10, inner 
side of brachial spine magnified two diameters. 
Shumard defined this species as follows: 
“The dody of this species is sub-hemispherical, concave below 
and the surface finely granulose. 
‘The dase is very deeply concave, pentagonal and completely 
concealed from view when the column remains attached to the cup. 
The five pieces of which it is composed are of a rhombic shape, 
longer than wide, and the interior edges nearly double the length 
of the exterior ones. 
‘The columnar facet is circular, crenulated on the border; the 
central perforation rather large and pentalobate. In the interior 
of the calyx the base forms an elevated conical protuberance. 
‘“The sub-radial pieces are thick and longitudinally recurved; 
four of them are pentagonal, a little longer than wide, their supe- 
rior edges gently arched and slightly longer than the infero-lateral 
edges; the basal edges are very short. The fifth sub-radial is 
hexagonal, its superior angle being truncated to support an anal 
piece. 
‘“ The first radial pieces are pentagonal, very massive, and as wide 
again as long. ‘The inferior edges are slightly concave and of 
equal length in three of the pieces, but on the anal side they are 

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