F. B. Meek on new Silurian Crinoids and Shells. 301 
f a crinoid, t hich grew at the free end of the long 
column-like ap age. This suggestion derives Some support tro 
the fact that the disk, although usually growing on the flat surfaces 
of shells, etc., is sometimes found growing upon the side of the col- 
mes 
umns of other larger crinoids, as well as on other uneven surfaces, 
: and in such cases, it is bent around to conform to the curve of the 
‘Surface of attachment, just as we see in crinoid roots: es ° 
situated ; while its whole interior is so filled with radiating lamel- 
as figured the root of one type ( Cleiocrinus grandis), apparently 
composed of an accidentally folded expansion © minute polygo- 
nal plates; and it is worthy of note, that the column attached to 
a 
such system of radiated lamellz being connected wit > 
4 crinoid ; but this objection would doubtless apply with ier 
eater force against the conclusion that this disk is the body o 
One of these animals. : 
__ Onthe other hand, among the strong object 
tion that these disks are roots, may be menti 
