52 
PALEONTOLOGY OF NEW-YORK. 
Fig. 5 a . A portion of the frond of this species, natural size. 
Fig. 5 b. A portion of the poriferous face magnified. 
Fig. 5 c. A portion of the non-poriferous face magnified, showing distinctly the form of the fe- 
nestrules. 
Position and locality. In the impure calcareous layers associated with the ore bed at Wol¬ 
cott furnace, and at Whiting’s mill, Wayne county. (State Collection.) 
CRINOIDEA OF THE CLINTON GROUP. 
The Crinoidea peculiar to this group are few and rare ; and though the joints of a single 
species are very abundant in some localities, the remains of this class of animals do not in 
general form any distinguishing feature of the strata. 
In the lower part of the group, and particularly in the eastern and central localities, these 
remains are rarely seen, with the exception of some peculiar rings in the ore beds of Herkimer 
county. After passing west of the Genesee river, the upper limestone is often composed in great 
measure of the fragments of crinoidal columns ; and at Lockport, numerous fragments of co¬ 
lumns and some of the bodies have been found, but even here they are obscure and unsatisfac¬ 
tory. At this locality, however, I have found, in the upper limestone of the group, fragments of 
Hypanthocrinus and Caryocrinus, which we regard as typical of the Niagara group. In the 
same limestone, Col. Jewett has found the body of a Caryocrinus, exhibiting a curious 
anomaly in the development of the plates. 
The description of the crinoidea of this group will be deferred in this place, and given 
altogether with those of the Niagara group. 
