234. Cinctnnati Society of Natural History. 
CoMPSOCRINUS HARRISI. 
[Glyptocrinus harrisi, S.A. Miller, 1881, Jour. Cin. Soc. Nat. Hist., vol-iv., p. 74, Pl. f., 
figs. 4 and 4a.] 
(Plate XI., Fig. 4, A flattened specimen, natural 8izs. showing the separation of the 
radial plates at the sutures as in the type specimen. Fig. 4a, Diagrammatic view of the 
end of the column, basa!s and first primary radials.) 
General form of the calyx, obconoidal, with flattened interradial, 
intersecondary and intertertiary areas. Radial ridges strong, and 
plates separated at the sutures. Surface strongly sculptured with 
star-like ornamentation in relief, or something like the sculpturing on 
Glyptocrinus decadactylus, though much stronger marked. 
Column four sided, each side slightly concave, and the four corners 
rounded. This is its form at the head, and it is yet undecided whether 
or not it is round below. 
Basals four, two pentagonal and two hexagonal, each about twice as 
wide as high, and deeply sculptured on the surface. The three 
primary radials are of about equal size. The two secondary radials 
are of about equal size, and about the same size as the primaries. 
There are eight tertiary radials in each series, which gradually 
diminish in size. There are twenty free arms at the vault. There 
is one plate at the base of the regular interradial areas resting between 
the first primary radials, it is followed by two plates, and above these 
there are two or three plates in each range to the top of the vault. 
The intersecondary areas have one or two plates in each transverse 
series, and the intertertiary plates follow each other in single order. 
The first azygous plate rests upon one of the four basals, and is the 
same size as the primary radials. It is followed by a series of rather 
large plates, upon each side of which there are nearly as many plates 
as in the regular interradial areas. The vault is unknown, but from 
the general form and structure of the body it is inferred that there is 
no proboscis, and this is one reason that the species is not supposed to 
be referable to the genus Xenocrinus. The upper part of the calyx 
resembles that of Glyptocrinus. The arms bear strong pinnules. but 
whether or not other bifurcations take place above the vault, is yet 
unknown. 
The species is from the upper part of the Hudson River Group, 
near Waynesville, Ohio, and all the specimens I have seen belong to 
the collection of I. H. Harris, of that place. 
