242 SS. Lyon and S. A. Casseday on new species of Crinoidea. 
beyond the body where it joins to it, deeply concave below, the depression 
left by the column forming a still deeper concavity, occupying about half 
the diameter of the whole base, the centre being perforated by a small 
pentapetalous opening. : : 
First radials five, very minute, quadrangular, thrice as wide as high. 
Second radials similar in form and size to the first radials. The third 
radials are axillary, twice the size of the first, and support on each 
single carinated protu 
the base along the middle of the rays and 
distinctly marking the course of the rays 
nt 
berances, more or less prominent, extending from 
their branches to the free arms 
Vault, The vault is of an elevated conical form surmounted by 4 
proboscis, the whole being covered by irregular sized pieces, generally 
hexagonal in form, rising from the margins toward the centre and termr 
nating in a point—in some specimens, the centre of the pieces are marked 
by two or sometimes.three points. It happens that all these forms are 
found in the same specimen 
A f th 
in a sub-rotund column about one third of th : 
en and expand towards the top; at the middle of their length they 
are half an inch wide and about a sixteenth of an thi ort 
istance the margins are parallel when they suddenly contract by a gra 
ful curve to about half their greatest width, the sides again becoming 
rallel for half an inch, when they close by a circular curve which 
Sounds inds the upper extremity. The insides of the lower parts of these 
arms are flattened and grooved by a deep semicircular sulculus, the mat 
gins of which are lined with very fine, long cilia up to the enlargement 
. nnot be traced, in 
of the arms, beyond which they cannot be traced, in fact we suppos? 
