S. Lyon and S. A. Casseday on new species of Crinoidea, 285 
Dimensions. 
Diameter on second — ‘ - - - 1:00 inch. 
Height from base to a - - - - + eg 
Length of spines on first Tadials, eee 
Greatest diameter of summit, - - - |e 
Least diameter of summit, - : - —— € 
Greatest height of summit, - | - - - ou... © 
Len ength of arms of a specinien whose summit diam - 9 
eter is 1529, inch length ts riggs 
Length of longest branch, - + oe ie 
Length of ciliated branch, — - ore oS - roo. = 
Thickness of ciliated branch, . - eo eee 
Geological position and locality. Found in iy beds near the top of 
the knobstone member of the hci s beds on Clear Cree: 
Hardin Oo., Siero so in the same geological position in Washington a 
scribed by F. re Roemer in 1850,* and again in 1854 by Zeiler and 
Wirtgen,f the differences are such that we unhesitatingly refer our fossil 
to a new genus. The columns are very unlike. Although closely resem- 
bling each other in the interradial and anal fields, and the number of 
Forsestocrinus, De Koninck and Le Hon. 
Forbesiocrinus multibrachiatus, sp. nob. 
Body subglobose where the arms are folded inward as is me 
one; a e bee to the free arms somewhat discoid, robust, externally 
covered with minute granules 
Basal pieces, three, similar in form and size, forming by their outer 
. Margins apparently the upper joint of the column, slightly thickened 
Opposite the pe of the pieces. 
colntnigs eee 
Ra 
adial pieces, 1st series. aan four nah te “ 
* F. A. Roemer, N. Jahrbuch 1850. 679, taf. vi, B. 
jE Rar i Me FE a 
Bonn, 1855, 
