r 
‘ | Description of Some New and Remarkable Crinotds. 73 
- tubercle, in the central part, as in the regular interradial areas. There 
are seven plates, each having a length about twice as great as its width, 
in the vertical series, from the basal plate, upon which the series rests 
to the top of the vault. This vertical series is continued to the top of 
the proboscis, and contains in its entire length more than fourteen 
plates, It has such strong resemblance to the radial series, except as 
to the branching at the secondary radials, that the general appearance 
of the body is that of a species having six radial series. 
Arms and pinnule.—There are ten arms composed of cuneiform 
plates, the length of three of which is about equal to the diameter of 
an arm. The pinnule are comparatively coarse, and hence form a 
dense fringe, upon each side of an arm ; they are long and composed 
of more than a dozen plates. Some of the lower pinnulz appear to be 
incorporated into the general body, an appearance noticed in Glypto- 
- crinus nealli, by Prof. Meek, and in G. richardsoni, by Prof. Wetherby. 
Column.—The column is quadrangular at the head, but possibly 
round below. It is perforated at the center by a small, round orifice. 
The face of each plate contains a central square body, having a diame- 
ter equal to about half the diameter of the column, which is sur- 
rounded by a quadrijugous, serrated line, having the angles extended: 
and the sides depressed or concave, and which in its turn is surround- 
ed by a smooth, quadrangular margin having concave sides. 
The genus and species were first studied from two specimens, illus- 
trated by figs. 3, 8a, and 3b, from the collection of I. H. Harris, Esq., 
of Waynesville. Ohio, and which were found in the Hudson River 
Group of that locality. Subsequently I received a specimen for exam- 
ination, from Dr. D. T. D. Dyche, of Lebanon, Ohio, which shows the 
azygous side and fourteen plates of the vertical series. From this 
specimen we learn that the proboscis extends as high as, and probably 
beyond, the extremity of the arms. And later I received from the 
collection of Dr. 8.8. Scoville, of Lebanon, the specimen illustrated 
by figure 3c, which shows very well the character of the pinnule. As 
the species has been collected at two or three different places, in the 
upper part of the Hudson River Group, in Warren county, and the 
quadrangular, columns are not uncommon, at the same range, in Indi- 
ana, the species may not be so rare as we have been led, hitherto, to 
suppose. The square column, which I described in the Cincinnati 
Quarterly Journal of Science, in 1875, and which changes to a round 
column a few inches below the head, does not, probably, belong to this 
_ Species. For years collectors have sought for the head belonging to 
