S. Lyon and S. A. Casseday on.new species of Crinoidea. ‘15 
our possession six or seven specimens, all showing this arrangement, its 
actuality is placed beyond cavil. 
described (Iowa, vol. ii, p. 625, pl. 18, fig. 7, 8,) C. spurius, 
to which our species is most closely related ; it differs in the sixth arm, 
which alone constitutes it a distinct species, See also P. Meekianus, Shu- 
mard (Geol: Rep. Missouri, p. 188, pl. A, fig. 7, a, b). 
Geological Position and Locality—Found in sub-carboniferous beds of 
Clear Creek, Hardin county, Ky., and Montgomery county, Indiana, 
Actinocrinus Indianaensis, nobis. 
Calyx, sudglobular, ornamented with hieroglyphic. sculpture. Pro- 
boscis‘long and thin, arms very long, articulations similar in size 
Basal pieces, three; large, extending beyond the supra columnar 
‘ ; . 
ault—about equal in size to the calyx, composed of many small 
Sharp thorns. The whole is surmounted by a thin, long proboscis, com- 
d of very minute pieces, and closed at its extremity, where it widens 
Out into a fusiform shape. : 
1 '.—When in a normal condition there are eighteen pairs of arms, 
ong, dividing into two branches almost immediately after leaving the 
Tachials, each branch running out to the end without further bifurcations. 
' are formed of a double row of pieces, which at their juncture pre- 
Sent a serrated appearan their outer extension they become 
ies smaller, until at their end they are quite attenuate and gene- 
Tally curved inward. They are deeply sulcate on their inner surfaces, 
