276 The American Geologist. November. 1904. 
There is little difference in the size of the radials and costr.l>. 
There are three distichals above the axillary second costa^ to 
where the wed^^e shaped arm pieces Ijegin. 
Arms, rounded, continuations of the radial folds and com- 
posed of a single series of wedge-shaped pieces that give off 
alternately rather long, slender pinnies whose joints are long 
and grooved on the ventral side rather deepl}-. The pinnies 
near the base of the arms are much stouter. The interradial 
areas somewhat depressed and each filled by a series of i, 2, 
2, etc. plates, the lower and larger one of which is hexagonal 
and lies between the first costals. its lower angle filling a 
shallow \" between the upper edges of the radials. 
A'entral surface unknown. Infra-basals, if present, not 
visible beyond the stem base. Arms apparently long and ten 
in number. 
Column round with every third or fourth joint much wid- 
er than the rest. 
Locality and horizon: two and one-half miles northeast of Edge- 
wood, Pike county. Mo., and from an earthy limestone of the age of 
the Clinton group. 
Glyptocrinus insperatus var. pentagonus, n. var. 
Plate XVI. Figs. 35. 30. 
This fossil is somewhat larger than the preceding one 
with much stronger radial folds or ridges and more distinct 
stellate ornamentation of the plates, especially the interradials. 
A fold; quite as strong as the radial ones, passes up the mid- 
dle of the anal area from the center of a basal. The five 
double foiids O'f the basal region form a flat star and th.e in- 
verted \'"s formed by folds' from the centers of the radial to 
the centers of the basals' together with the rays of the basal 
star bound deep diamond-shaped areas. 
The interradial areas are flat, the anal interradius being 
broader than the other four. The ])late arrangement is ex- 
actly as in figure 34. Fine granules cover the surface of the 
plates. 
The s])ecimen preserves the cahx to the top of the second 
costal which is a bifuricating plate and there are perhaps but 
ten arms. 
The colunmar base is round and the jierforation rather 
small. h"<)ur of tlie basal plates are ])erhaps jientagonal (in 
