17 
four j^riucipal bundles, two dorsal and two ventral ; in tlie centre of the 
corallum certain of the principal septa meander and coalesce to enclose 
a series of large open vesicles ; an outer narrow, but well-marked, vesicular 
zone exists, beyond which the secondary sej)ta do not proceed, and in w^hich 
the primary septa are not enveloped in stereoplasma ; dissepiments fine and 
fairly regular ; stereoplasma thickly enveloping the septa from the margin of 
the outer vesicular zone to the edge of the central vesicles ; loculi in the 
outer zone more or less rhomboidal, when confined by stereoplasma very long 
and narrow, folloAving the curve of the septa ; fossula indistinctly marked, 
but apparently lateral, Avith one secondary alar septum. 
Ohs . — The septa in this species are very irregularly grouped, but 
there Avould appear to be four chief sets. The coalescing of the bundles 
by means of six or scAmn of the primary septa is very marked, and results in 
the enclosure of several large vesicles or spaces filled AAuth clear calcite. 
One of these septa, possibly corresponding to the ventral counter septum, 
passes directly across the centre, uniting with another Avhich may represent 
the cardinal septum. I liaAm not obseiwed any trace of a tabulate area. 
The loculi confined between the septa Avhen thickened AAuth stereoplasma are 
particularly long and narrow, and at times subdivided by very minute 
dissepiments at long intennls apart. The section of this coral resembles in 
many ways that of Z. patiila, Michelin, as figured by Thomson^ more 
particularly as regards the central vesicular space. 
Locality and Horizon . — Somerton, near TamAAorth, Co. Parry {D. A. 
Lorter ): — Horizon doubtful, but in the Upper Marine Series. 
Genus — LOPIIOPHYLLUM, Edwards and Ilaime^ 1850, 
(Mon. Brit. Boss. Corals, lutrod., 1850, p. Ixvi.) 
Ohs . — Two species of Lophophyllum Avere described by Prof. De 
Koninck as existing in the Clarke Collection, One of these, L. minutuin, 
He Kon.^, has not come under my notice ; the other, L. corniculmn, or at any- 
rate a coral believed to be it, is described below. 
' florals of the Carboniferous System of Scotland, 1883, t. 6, f. 12, 12a. 
*'Foss. Pal. Nouv. Galles du Sud 1877, Pt. 3, p. 147, t. 5, f. 5. 
