79 
the partially oh-conic or urn-shaped outline which the calyx evidently 
possessed originally indicates JPeriecliocritius {Saccocrinus), or Strotocrinus, 
or some other near ally, as its resting place. Prom the list of species given 
hy Wachsmuth and Springer, 'Fericcliocrinus appears to he essentially an 
U2)per Silurian genus, with the exce2)tion of two American Carboniferous 
species, P. ampins, M. and W., sj)., and P. Whitei, Hall, sj)., to neither of 
which does our species hear any great sjiecific resemblance. It is, however, 
with an American Crinoid from the Niagara Group, P. {Saccocrinus) Christ iji. 
Hall, sp.\ that our Permo-Carhoniferous fossil agrees so closely in the form 
of its plates and outline of the calyx, and also with many of the species so 
beautifully figured in Angelin’s posthumous work‘d on the Silurian Crinoids of 
Sweden. 
An equally strong resemblance exists between P. {Saccocrinus) indi- 
cator, and the American Carboniferous genus Strotocrinus, which agrees 
“ exactly with Actinocrinus in the number and arrangement of the jiieces 
comjiosing all that j)art of the body below the divisions of the rays,”^ Stroto- 
crinus regalis. Hall, sj).,"* joossesses the same oh-conic outline and succession 
of radials and inter -radials, but there is about our s^^ecimen no trace of the 
characteristic horizontally exjoanded rim of the former genus, and without 
which it would not he jiossible to em^fioy Strotocrinus for the recej^tion of 
P. indicator. 
One of the elevated ridges of the radials which jiass from plate to 
jdate in Fericcliocrinus is indicated in our specimen hy a marked angularity 
of the surface. 
Locality and Horizon. — Chalky Gully, Wollumha Iliver, Co. Gloucester 
{Fres. E. Twynam, Chief Surveyor) : — ? Carboniferous. 
Peeieciiocrinus ? sp. ind. 
Photo-litho., Pig. 1. 
Ohs. — Some flattened and decorticated jdates, more or less apposed to 
one another, probably represent either another species of this genus, or simply 
an Actinocrinus. The s^iecimen is, however, of interest from its geological 
j)osition. 
1 See Illinois Geol. Report, Pal., 18G8, III, p. 347, t. 5, f. 1. 
^ Iconographia Crinoid eorum in Stratis Suecia; Siliiricis fossilium (folio, Holiniie, 1878). 
^ Meek and Worthen, Illinois Geol. Rej)ort, Pal., II, 1866, p. 189. 
See Illinois Geol. Report., Pal., 1866, II, p. 192, f. 7, t. l6, f. 6« and b, 
11a 64—92 D 
