176 Cincinnati Society of Natural History. 
Marcy, I propose to restore theirname. It is better to use the name 
I. corbis than to propose a new name, especially when it is evident 
that some of the characters which oe saw belong to it, and do not 
belong to J. subangularis. 
The body is pyriform, and in our specimen preserving the Fee it 
is straight, as it is in many of the casts. Other casts have the lower 
end turned to one side, and have one side more ventricose than the 
other. 
The subradials are pentagonal, and about twice as wide as high. 
The surface of each is a triangular pyramid, having the apex in the 
middle of the lower part, one side sloping toward each of the adjoining 
radials, and the other below. These plates, therefore, when viewed 
from below, show a pentagon with the angles projecting so that a per- 
pendicular line would strike the sutures separating the second radials 
in the primary series. There are three primary radials in each series 
except the anterior one which has four. Three of the first radials are 
pentagonal, and two hexagonal; three of the second quadrangular, 
and two pentagonal; and three of the third pentagonal, and two 
hexagonal; the increased number of sides being caused by each 
of the plates on the sides of the anterior series abutting against 
two instead of one plate. The plates have an angular ridge in the 
middle, which is extended like a node, upward, from the central part of 
the last radial in each series. The secondary radials have four in 
each series which are convex in the middle part, but a transverse sec- 
tion here would be nearly round, instead of pentagonal, as it would be, 
through the primary radials, by reason of the angular extension of the 
plates. 
When the plates are preserved, there is no difficulty in distinguish- 
ing this species from J. subangularis, by the form of the subradials 
and primary series, but as we do not know the appearance of the cast 
of an J. subangularis, it is not so easy to show how it differs from the 
cast of Z, corbis, which is common at Bridgeport. 
The consideration of the Bridgeport and Cicero crinoids will be re- 
sumed in the next number of the JouRNAL. 
XENOCRINUS PENICILLUS, S. A. Miller. 
Plate IV., fig. 6, view of the azygous side, showing fourteen plates of the vertical series. 
The same specimen referred to on page 73 as belonging to Dr. D. T. D. Dyche. 
