126 
Case and 
Column of 
Drawers. 

FC 
FC 
FC 
FC 
SILURIAN. 



Reference to McCoy's 
Synopsis: and Figures of Genera. Names and References; Observations, &c. 

Taxocrinus granulatus, Salter, n.s. (Like 
marmoratus.) 
Taxocrinus nanus, Salter, n.s. Its squat form 
and single interradial easily introduce us 
to the next genus. 
Ichthyocrinus, D’Orbigny. Distinguished from 
Taxocrinus solely by the want of any inter- 
radial plates; the arms lie close together, 
and start at once from the basal plates or 
pelvis. 

Ichthyocrinus pyriformis, Phill. (Siluria, 2nd 
ed. pl. 14, fig. 8). A most elegant crinoid, 
in which the short joints of the arms and 
fingers range equally across the whole 
figure, which is pyriform, and apparently 
never spread out. 
Ichthyocrinus Bacchus, MSS. n.s. The de- 
pressed short form and very short plates 
so much resemble those of Taxocrinus nanus, 
that some close observation is needful to 
distinguish this, which has no interradial 
plates, from the former, which possesses very 
narrow ones. (J. W.S.) 
CYSTIDEZ, Von Buch. 
Globe crinoids or Globe-lilies. | Crinoids in general plan: these are almost de- 
prived of the characteristic arms; a few ten- 
tacles round a wide stomachal surface (ambu- 
lacral, Huxley), the aperture of which is not 
yet known, are in a few genera exchanged 
for simple recurved arms (Pseudocrinites, 
Apiocystites, &c., and other Upper Silurian 
genera): these are laid in special grooves, so 
as to be as much out of the way as possible. 
The whole group has relations with Pentre- 
mites, through which it seems to approach 
the true Echinei, &c. The anal, usually called 
ovarian opening, is covered by projecting 
plates. (Billings.) 


Numbers and Localities, 
a, 530, Dudley, F.C. 
a. 527, Dudley, F.C. 
a. 498, a. 529, Dudley, F.C. 
a. 528, Dudley, F, C. 
