236 S. Lyon and S. A. Casseday on new species of Crinoidea. 
lightly in size: the fourth is axillary, obscurely six-sided, rising into a 
long angular point; on each of its oblique upper sides supporting three 
pieces of the secondary radials, which are similar in form and nearly as 
at the summit of which completes the field. 
Laterradial fields of the 2nd series, five, composed of pieces similar in 
orm, from six to seven in number, variously arranged, sometimes one sur- 
y two similar pieces, these by two others, then a smaller one, 
or one at the base, with one above the other, these again by two ranges 
of two, then one, all these forms are occasionally found in the same speci- 
ep., pl. 48, fig. 
fields in three series, it approaches F 
pl. 17, fig. 5), from which it differs widely in the number of anal woe 
atelloi 
come under our observation there are no patelloid pieces, in a few of our 
specimens (the prolongation of the superior pieces near the centre of 
before cited. It is highly probable that this prolongation in the living 
animal was less calcareous than the remainder of the piece, and owing to 
this circumstance, was differently mineralized from the mass of the piece. 
‘This very difference in the composition of the pieces, supposing that the 
