286 BRITISH FOSSIL CORALS. 
centre ; vertical section, apex filled with solid matter, centre with irregular vermicular lines 
(the sections of the complicated edges of the radiating lamella), from thence to the walls 
made up of small thick rounded vesicular plates, the obscure rows having a slight 
downward curve.” 
“Not uncommon in the Wenlock limestone of Dudley, Staffordshire.” M‘Coy, op. cit. 
8. CYATHOPHYLLUM ? VORTEX. 
CLISIOPHYLLUM vorTEX, M‘Coy, Ann. and Mag. of Nat. Hist., 2d ser., vol. vi, p. 277, 1850. 
= — MCoy, Brit. Palzoz. Foss., p. 33, pl. 138, fig. 18, 1851. 
“ Corallum simple, conic, slightly curved, enlarging at the rate of one inch eight lines in 
three inches from the apex; outer wall thin, faintly marked with subequal longitudinal 
lamellar strize (5 or 6 in the space of 3 lines at a diameter of one inch), and small con- 
centric wrinkles; at a diameter of one inch the horizontal section shows an outer area of 
about 60 thick, equal, radiating lamella, barely reaching one fourth of the diameter 
towards the centre, connected by small irregular transverse vesicular plates; a few of the 
pairs have a very thin, short, marginal lamella between each of the larger pairs, and where 
this occurs the vesicular transverse plates become much more numerous ; inner area rather 
more than half the diameter, forming a circular mass of confused vesicular tissue, crossed 
by a few arched radiating delicate lamella ; vertical section, having the narrow outer area 
on each side (corresponding to the lamelliferous zone) of arched vesicular plates, 
forming large unequal horizontal or slightly inclined cells, 1 or 2 cells extending across 
the width of the area; wide inner area composed of small oval cells, arranged in much- 
curved transverse rows, the convexity of the curve upwards. 
“ Wenlock limestone, Wenlock, Shropshire.’—M‘Coy, op. cit. 
Lurbinolia fibrosa, Portlock, is a cast found at Desertcreat, and appearing to belong 
to Cyathophyllum, but is not sufficiently characterised to be determined specifically. 
The same remark is applicable to the fossil figured by Professor M‘Coy under the 
name of Petraia zigzag. It is a cast of the interior of the visceral chamber of a coral 
which, in all probability, belongs to the genus Cyathophyllum, and had very flexuous coste. 
It is found in the Silurian formation at Ardaun, Cong, Galway. 
Several other casts that are not determinable specifically, and which have been referred 
to the non-characterised genus Turbinolopsis or Petraia, appear also to belong to this 
group. For example: 
Turbinolopsis elongata, Phillips,* a specimen of which belongs to the Collections of 
the Geological Society, and found at Leach Heath, Bromsgrove Lickey. We have figured 
1 Report on the Geol. of Londonderry, p. 329, pl. xx, fig. 7. 
2 Sil. Foss. of Ireland, p. 60, pl. iv, fig. 17. 
3 Brit. Paleoz. Foss., p. 6, pl. ii, fig. 6B, 1841. 
