S.S. Lyon and 8. A. Casseday on new species of Crinoidea. 71 
dually thinning downward; the outer end round and pointed; they 
are frequently found bifurcate near the end and double pointed : affix 
to the specimen they radiate regularly and ee the points being 
ani as high as the summit of the specime 
Mouth, central. 
Arms, twenty ; <a unknown. 
Column, unknow 
Dimensions, 
Greatest diameter of calyx, - - - *80 inch. 
* basal pieces, - - “49 © 
i “ columnar facet, - - 9s A 
Height of calyx, - - ~~ * 
Height of specimen, sical pa ait Ihe - - Te 
“non of wing articulations, with body, - » dees 
Widt - 12 « 
Height of first radial Pieces, - - - oC 
Width - 6 pes 
5 
Geological Positi ion a Localities. Fed énl¥s in beds near the top 
of the third limestone of the Millstone grit series of Edmondson, Grayson 
and ee counties, Kentucky. 
ents very abunda nt, good emg rare. Beds from’ one to 
two fed thick are found composed of a mass of the remains of this crinoid 
a. together, forming a distinctive me" characteristic bed of the 3rd 
Pterotocrinus rugosus, nobis. 
The condition of our specimen is such that a particular description 
cannot be made: the arrangement of the parts, however, is evidently 
quite similar to that of P. depressus. The basals, first, second and third 
radials, are 
of the arms, 
alit ity.— imperfect 
pecimen was was found in the lowest siliceous mud bed,* at nt Falls “4 
ugh Creek, Dreckinrdg county, Ky. Fragments of this species ar 
ate i ndan 
€ beds at Rough Creek, Grayson Springs, Grayson county, ai 
Baker’s Fur urnace, ss 7 gg a ae equivalents of 
each other. In the w an edge of fredkinridge county, they are sepa- 
___ fated by a thick sandstone, where the upper division of the li mestone ap- 
____ Peats to be the equivalent of the beds above enumera 
Proportions of this species is about the same as P. depressus. 
Zeacrinus ovalis, sp. nobis. 
Body—When - ease are closed the body is a the length being 
equal to about twice the bong all << at the bas 
th 5 fee minute, fo a — sight indented at 
: . marking . avin of the e column is 
TA a hg na 
