CORALS FROM THE MOUNTAIN LIMESTONE. 203 
17. Lirnostrotion FLEMING. 
Srytaxis Freminet, M‘Coy, Ann. and Mag. of Nat. Hist., 2d series, vol. ii, p. 121, 1849. 
— — Milne Edwards and Jules Haime, Pol. Foss. des Terr. Palzeoz., p. 494, 
1851. 
— — M‘Coy, Brit. Palzeoz. Foss., p. 160, pl. iia, fig. 3, 1851. 
“ Corallum of very long, prismatic, generally hexagonal, easily separable tubes, averaging 
3 lines in diameter ; outer surface strongly striated longitudinally, and marked with direct 
transverse rugosities of growth ; bipartite division of the columns frequent;’ vertical section, 
exhibiting the thin flat axis, surrounded by an inner zone of small, slightly curved, inter- 
stitial plates, inclining downwards and outwards from the axis, forming on each side a 
row of nearly simple oblique cells; owfer zone of small, vesicular, much-curved plates, 
inclined in an opposite direction, or upwards and outwards, four or five in a row; ori- 
zontal section, axis thin, half a line wide, surrounded by about 43 thin, radiating lamelle, 
from the walls, half of which only reach half way; numerous small, thin, transverse, con- 
necting plates between the lamella in the outer zone. 
“Common in the carboniferous limestone of Derbyshire.” (M‘Coy, op. ect.) 
6. Genus PHILLIPSASTRAA, (p. Ixx.) 
1. PuiziipsastR#A RADIATA. Tab. XXXVII, figs. 2, 2a. 
ERISMATOLITHUS TUBIPORITES (radiatus), 7”. Martin, Petrif. Derb., pl. xviii, 1809. 
Touprpora RADIATA, S. Woodward, Syn. Table of Brit. Org. Rem., p. 5, 1830. 
Astrea Hennantt (pars), Phillips, Paleoz. Foss., pl. vii, fig. 15D, (Cet. excl.), 1841. 
(Not Lonsdale). 
SARCINULA PLACENTA and Puruutesit, M‘Coy, Ann. and Mag. of Nat. Hist., 2d series, 
vol. ii, p. 124, 125, 1849. 
PHILLIPSASTREA HENNAHII (pars), D’ Orbigny, Prod. de Paléont., vol. i, p. 107, 1850. 
PHILLIPSASTREA RADIATA, Milne Edwards and Jules Haime, Pol. Foss. des Terr. Palzoz., 
p. 448, i851. 
SarcrnuLa Purtriestt and pLacenta, M‘Coy, Brit. Palzeoz. Foss., p. 110, pl. iii, fig. 9, 
1851. 
Corallum massive, astreiform, with a flat surface. Calices irregularly placed ; their 
edges very slightly prominent, and their central fossula rather deep. Colwmella slender, 
compressed, and in general not very distinct. Septo-costal radii almost completely con- 
fluent exteriorly ; 24 or 30 in number, very thin, and becoming alternately unequal in 
size near the walls, where some of them terminate. Diameter of the Calices about 
1 We have here above explained how this appearance may be produced by submarginal gemmation. 
(See p. 192.) 
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