S. Lyon and S, A. Casseday on new species of Crinoidea, 73 
Length of finger, first bifurcation, - 94 inch. 
“ “ second “ 2 ‘80 “ 
“ “ t ir “ "45 “ 
05 “ 
h 
Depth of columnar pit, = - - 
Geographical Position and Locality——Found in the third limestone of 
the Millstone grit beds of Grayson, Breckinridge, Edmondson and Todd 
counties, Kentucky. 
It has not been found in any other geological horizon in the Millstone 
grit beds of Western Kentucky, and may be classed amongst the distin- 
guishing fossils of this particular bed of limestone. 
Remarks.—Our species, in the arrangement of the calyx, ap- 
proaches Z. Worthenii (Hall), from which it differs in having three 
instead of four primary radials; also in the number of pieces in 
the first branches of the rays. It differs from Z. magnoliceformis 
(Troost) in the arrangement of the calyx, the first radials and 
subradials being much shorter in our species. 
Cyathocrinus dekadactylus, nobis. 
their bord 
Basal pieces, five; pentangular, forming together a marked stellate 
figure; upper facets prolonged into nearly acute angles; under surface 
aigully excavated, 
dials, five; the first are large, various in their shapes, gone 
as 
drms.—The arms are apparently without any subdivisions throughout 
whole length. ‘They come off immediately from the radials; the 
on 
At the juncture of any three pieces composing the calyx, there is a de- 
Pression, which attains be scstaet depth along the suture lines of the 
These depressions are an easily distinguishable character of this 
SECOND SERIES, Vor. XXIX, No. 85.—JAN., 1860 
10 
