306 The American Geologist. November, 1893 
low and bearing nodes and* depressions. First radials a shade 
wider than long, six sided and each having an X shaped ele- 
vation. The second radials are quadrangular and wider than 
long. Third or bifurcating radials five-sided, wider than long, 
and each supporting on the sloping upper faces from one to 
two. five or six sided secondary radial pieces above which are 
the arm-bearing plates, fifteen or sixteen in number. There 
are from one to three interradial plates to each area, the larg- 
est being from eight to ten sided. The other two when pres- 
ent are very small. There are from six to seven plates in the 
anal interradius, the lowest and largest being six sided and a 
little less than the first radial in size. The fifteen or sixteen 
arm openings are directed outward. All of the calyx plates 
are prominent, being tumid or sculptured. The plates of the 
dome are nodose or contain angular prominences. Base of 
the proboscis rather strong. Column and arms unknown. 
Columnar facet of medium size and round, Ilight of type ^ 
inch, width little less than ^ inch. 
Prom the Burlington limestone at Springfield, Mo. 
Named in honor of Prof. E. M. Shepard of Drury College. Types in 
the author's collection. 
Graiialocrimis mutahilis (now sp.i. 
(Plate xiv, fig 4. Side view of a large globose specimen, enlarged 
two diameters. Fig. o. Side view of an elongate specimen, natural 
size. Fig. 6. Specimen with a very convex base, natural size. Fig. 7. 
Basal view of fig. G, enlarged two diameters. Fig. 8. Top view of an- 
other specimen, two diameters. Fig. 9. A small Pentremites-like 
specimen, natural size.) 
Body globose to oval. Base slightly convex, sometimes very 
much so. Basal plates three in number, the largest quadran- 
gular. The radials in length equal the hight of the body, 
ornamented by longitudinal granular lines. Interradial and 
anal pieces small and confined to the dorsal side of the body. 
Ambulacra of medium width, extending the entire length of 
the body, except in specimens with very convex bases. Side 
pieces numerous. The ambulacra do not extend beyond the 
general surface of the body and are on a plane with the up- 
turned edges of the radial pieces. The lower part of each 
ambulacrum forms a slightly projecting foot. Anal opening 
of medium size. Spiracles very small. Length of the largest 
specimen r 5 fl of an inch; of the smallest ,-,. . 
