_ Description of Some New and Remarkable Crinoids. 75 
y The species is founded upon a single specimen, from the collection 
of I. H. Harris, Esq., of Waynesville, Ohio, in whose honor [ have pro- 
posed the specific name. It was found in the upper part of the Hud- 
son River Group, at that locality. 
GLYPTOCRINUS COGNATUS, 0. Sp. 
Plate I., fig.5, view of the lower part of the body, natural size; fig, 5a, side view, natural 
size. 
Body, turbinate; strongly pentagonal in outline, as viewed from be- 
low; height about equal to the width. There are five sub-basal plates, 
having a height at the superior angle, in the middle, nearly equal to 
one half the width of a plate. There are five comparatively large, 
heptagonal, basal plates, about as wide as high, depressed at the line 
of junction, and elevated in the central part, thus forming a sub-pen- 
tagonal outline for this part of the cup. These plates, each, rest upon 
two of the sub-basals, support upon the upper sloping sides the radials, 
and upon the superior face an interradial, ; 
The first primary radial is heptagonal, about as wide as high, and a 
little larger than either of the others; the second and third are hexag- 
onal, and a little higher than wide; the three form a convex, elevated 
ridge, which gives to the body a strong, pentagonal outline, when 
viewed from below. The third supports upon its upper sloping sides 
the secondary radials, and upon its superior face an axillary or inter- 
secondary radial plate. Not less than eight of the secondary radials 
or brachial series enter into and form part of the body. They gradu- 
ally diminish in length, so that at about the eighth plate the arms be- 
come free. 
Regular interradial areas deeply excavated, and occupied by about 
_ forty plates, and axillary areas also deeply excavated, and occupied by 
about twenty plates. 
The species is established upon a specimen found in the upper part 
of the Hudson River Group, near Middletown, Ohio, and now in the 
collection of Dr. R. M. Byrnes, of Cincinnati. The azygous area and 
character of the arms, unknown. 
It has a close relationship with Glyptocrinus nealli, though it is dis- 
_ tinguished by having larger plates, and only about half as many in 
the interradial and axillary areas. The sub-basals are developed so 
_ they might be properly called basals, and thus remove the species from 
_ the genus Glyptocrinus. I have called it cognatus, from its being near 
_ akin to the nealli, and by some it may be regarded as only a variety, 
a but comparing it with the specimens in my own collection, I am in- 
