18 Cincinnati Society of Natural History. 
being the larger one and all sharply pointed at the upper angle; 
the other one is hexagonal with an upper concave articulating 
facet for the first azygous plate; primary radials five in each ray, 
very gradually decreasing in size upward and becoming more and 
more sharply rounded; each one is wider than high and the sutures 
are transverse, with the exception of a slight concave central, 
exterior depression; the fifth plate is angular in the central part of 
the upper face and supports the two series of brachials; the brach- 
ials and arms are very short and thick, and the sutures between 
the plates become more and more sinuous toward the extremities ; 
the first arr is given off at about the fourth brachial, and above 
this there are twelve or more short, branching, curving arms that 
form a cluster at the end of each ray. 
The first regular interradial is large and octagonal; it is followed 
by three plates and these by five, and above they are smaller and 
more numerous; four interbrachial pieces are visible in our speci- 
men, and there are, probably, more; the azygous plates are small, 
short, and sutures sinuous. 
Found in the Keokuk Group, at Crawfordsville, Ind., and now 
in the collection of Wm. F. E. Gurley. The specific name is in 
honor of Prof. E. O. Ulrich, of Newport, Ky. 
AGARICOCRINUS SPLENDENS, Nl. Sp. 
Flate [V., Fig. 1, side view with arms; Fig. 2, basal view of same. 
This species is of medium or rather under medium size; base 
concave; surface granulous; basals small; first radials small; 
second radials quadrangular, wider than long; third radials pentag- 
onal, wider than high, and supporting upon each of the upper 
sloping sides a thin brachial plate, which is followed by another 
thin plate having two upper slightly sloping sides which support 
the regular interlocking series of the arm plates; arms, twelve, 
three in each ray adjoining the azygous side, and two in each of 
the other three rays; they are a little longer than the greatest diam: 
eter of the calyx, rather small and taper to a point; pinnules 
fine; regular interradial areas narrow, the first plate resting 
between the second radials, which is followed by two smaller ones 
situate between the third radials and the first brachials; azygous 
area having one plate followed by three of nearly the same size, 

