120 
Case and 
Column of 
Drawers. 
SILURIAN. 

Reference to McCov’s 
Synopsis; and Figures of Genera. 
Names and References; Observations, &c. 
Numbers and Localities. 

FC 
FC 
FC} 
Ge 
FC 
FC 



Eucalyptocrinus, p. 58. 

Lucalyptocrinus, 
P). 1D, fig. 2, p. 58. 
For figures of several of these 
genera, see Siluria, 3rd ed. 
pl. 13, figs. 4, 5. 
Hypanthocrinus decorus, Phill. (Hucalyptocri- 
nus, Siluria, 2nd ed. pl. 14, fig. 2). The 
remarkable large interbrachial plates (a) 
placed between the arms readily distinguish 
this from any other genus. The convex 
plates of the cup interradial (b) plates, placed 
between the radial (c) plates which go directly 
to the arms from the cup or calyx (basal 
plates, d), distinguish it from H. laciniatus, 
and H. granulosus, both Dudley and Walsall 
species. The nomenclature of the plates of 
the cup of a crinoid is best given by De 
Koninck, in his monograph of the Belgian 
Crinoidea from the Carboniferous Limestone. 
| Hypanthocrinus granulatus, Lewis. London 
Geological Journal, 1847, p. 99, pl. 21. 
Geol. Mus. Jermyn St. has good Walsall 
ones. 
Hypanthocrinus polydactylus, McCoy. An 
excellent species, easily distinguished from 
both the last by the many-branched arms. 
This species shews the affinity of Hypan- 
thocrinus to Marsupiocrinus very easily. 
Dimerocrinus, Phill. Sil. Syst. 1839. Still fur- 
ther removed than Marsupiocrinus from the 
last; there is yet much affinity. The inter- 
radial plates (a) are very conspicuous. The 
species very common at Dudley. 
| Dimerocrinus icosidactylus, Phill. (Siluria, 2nd 
ed. pl. 13, fig. 4). The twenty arms and 
three or four interradials distinguish this 
common form from the next species. 
| Dimerocrinus multiplex, n. sp. Five or six or 
more interradials, none of which are con- 
spicuously larger than the rest. 
Dimerocrinus uniformis, n. sp. Cup all even, 
the sutures barely marking the smooth 
plates. Ten arms, which are parallel. 

a, 392, Dudley, F. C. 
a. 393, Dudley, F.C.; cast 
also from Gray’s specimens, 
Brit. Mus, 
a. 670, Dudley, F.C. good, 
with Glyptocrinus. a. 669, 
ditto, 
a, 404, Dudley, F. C. 
a, 405, Dudley, F. C. 

