New Species of Fossils and Remarks upon Others.- 175 
pressions between, deepening upward, and giving great prominence to 
the arm bases. 
_ Basal plates four, about as wide as high. First radials a little 
longer than wide, and a little larger than any other plates ; three of 
them are heptagonal the other two hexagonal. Second radials a little 
smaller than the first, a little longer than wide, and hexagonal. The 
third radial is a little smaller than the second, heptagonal, and sup- 
ports upon its upper sloping sides the secondary radials. There are 
two plates in each secondary radial series, above which the brachial 
plates arise. The regular interradial series consists of one hexagonal 
plate, resting upon the first, and between the second radials, and of 
about the same size as the second radials; this is succeeded by two 
hexagonal plates of nearly the same size; and these by a range of three 
smaller ones, which are succeeded by two plates, and these are followed 
by the smaller plates of the summit. There is a single plate in each 
intersecondary radial area. The plates of the azygous area are not 
determined. The summit is nearly flat, covered with small plates, and 
possessed of a subcentral proboscis. 
ICHTHYOCRINUS CoRBIs, W. and M. 
Plate IV., fig. 5, view of a specimen with the plates preserved. 
(Ichthyocrinus corbis, Winchell and Marcy, 1865, Mem. Bost. Soc. 
Nat. Hist. ) ) 
Winchell and Marcy described this species from the Bridgeport 
casts, and made its distinctive features consist of a small column, 
large basals, corresponding to the sides instead of the angles of the 
pentagonal base, the presence of two instead of three radials, and the 
perfectly straight transverse sutures separating the plates of the 
several radial series, except the suture separating two successive 
series. They were very clearly mistaken in supposing there were only 
two instead of three radials, and their diagram is therefore erroneous. 
Prof. Hall pronounced the species identical with Z. subangularis, 
and he illustrated a specimen preserving part of the plates, from Bridge- 
port, which evidently belongs to the latter species. This seemed to con- 
vince paleontologists that 7. corbis is a synonym for J. subangularis. 
But I have a specimen preserving part of the plates, from Bridgeport, 
which is quite distinct from the latter species, and as I have no doubt 
that a large part of the casts, from that locality, belong to the same 
Species, and that many of them were in the hands of Winchell and 
