6 Cincinnati Society of Natural Firstory. 
sides the free arms; the one opposite the azygous side bears two 
arms, each of which has a single plate followed by, a double series 
of interlocking ones; the others support four arms each; the 
upper sloping sides bear pentagonal plates, similar in form to the 
second radials, which are followed with a single plate that, in its 
turn, bears a double series of interlocking ones. 
There are fourteen large, long arms, composed of a double 
series of interlocking pieces, rounded externally, and flattened 
upon the sides so that, in an accumbent position, they close some- 
what like the arms of an Ichthyocrinus; the arms in our specimens 
are spread out and the extremities are not preserved; pinnules 
numerous, but not very long; column round, and rather small for 
such a large Crinoid. 
This species has its nearest affinity with E. verrucosus, described 
in the Trans. Chi. Acad. Sci., Vol. I., p. 117, and redeseripediamd 
figured in the Report on the Paleontology of Eastern Nebraska, 
page 150. 
Found in the Upper Coal Measures, at Kansas City, Missouri, 
and now in the collection of Wm. F. E. Gurley. 
ULOCRINUS. n. gen. 
(Ety., owlos, solid, substantial; &vznon, lily. ) 
This genus has a more or less globular or pyramidal calyx, and 
is related to Eupachycrinus and Delocrinus. There are five basals, 
forming a slightly convex pentagonal disc, or a low cup; they are 
of the same size and usually anchylosed ; on the interior of the cup 
the columnar extension is round, depressed below the interior sur- 
face of the plates, and radiately furrowed like the articulating faces 
of the plates of many crinoid columns; on the exterior a star-like, 
columnar opening truncates the basal plates with the points of the 
five rays, between which there are radiating furrows for the attach- 
ment of the first columnar plate; by this arrangement the points of 
the basal plates are very thin, and disconnected only by the star- 
like perforation. 
There are five subradials, each one of which may be as large or 
larger than the five united basals; all regularly alternate with the 
basals, and have the same form, except that one may be truncated 
by an azygous plate. 

