224 
SILUEIA. 
[Chap. X. 
again, the several branches lying close side by side, and leaving scarcely any 
free space between them. Each joint gives off from either side a small lateral 
process, f. 7, which unites with that of its next neighbour ; and this is continued 
through the whole extent, so that the several joints of the contiguous rays are 
Fossils (56). Crinoidea of the Wenlock Limestone. 
1. Marsupiocrinites caslatus, Phil. 2. Magnified base of the arms. 3. Proboscis of j 
the same inserted in the shell of Acroculia haliotis. 4. Keduced figure of Crotalocrinus 
rugosus, Miller; the bag-like cluster of arms surmounting the small, round 'pelvis.' 
5. The latter, of the natural size, with the stomach-plates stripped off, and showing the 
base of the many-fingered arms. 6. The flat stomachal surface, showing also the 
branching of the arms from their bases. 7. A part of the reticulate congeries of fingers, 
each joint being anchylosed to its neighbour on either side. — [J. W. S., 1859.] 
all securely fixed to each other. Instead, therefore, of a star of free and waving 
arms, a deep and wide funnel is formed, like a wicker basket ; or rather (as the 
joints are all of equal length, and the lateral processes range in continuous 
transverse lines) the texture is like that of a piece of the coarsest-woven serge j 
or canvas, f. 4 a. This curious funnel of anchylosed arm-joints, therefore, was 
either flexible or grew in a lobed and puckered form *. But although, as before 
said, the numerous arms seem to start at once from the pelvis, their real origin 
is on the ventral surface further inward : see f. 6, where they commence with 
single joints, as in other crinoids, and are clothed with short tentacles to their 
very base. This surface is but rarely visible, the usual appearance of the cup 
being that which is seen in f. 5, and in PI. XIII. f. 3, which figures are of the 
natural size. The cup consists of fifteen plates. The stem, f. 4 b, was long ago 
figured by Parkinson in his 1 Organic Remains 'f. It is made up of close joints, 
each with a row of tubercles, which are perforated, the hole communicating with 
the central canal of the stem. Near the root, these tubercles lengthen out into 
* Since the first edition of this book was pub- overlapping each other, and highly convoluted, 
li shed, we have seen Miiller's beautiful figures of but not forming a continuous funnel. (Ueberden 
a very similar genus CAnthocrinus Loveni) from Bau der Echinodermen, pi. 8: Berlin, 1854.) 
the Isle of Gothland. In all probability there t ' Turban or Shropshire Encrinite,' vol. ii. pi. 
were in our species, as in his, five reticulate arms, 15. f. 5. p. 193. 
