170 BRITISH FOSSIL CORALS. 
4. Zapurentis ENNIsKILLENI. Tab. XXXIV, fig. 1. 
ZAPHRENTIS ENNISKILLENI, Milne Edwards and Jules Haime, Pol. Foss. des Terr. Paleeoz. 
p. 334, 1851. 
Corallum conical, slightly curved, pointed at its under end, covered with a thin 
epitheca, and not showing any circular accretion swellings. Cadice circular, very deep, 
and terminated by a thin margin. Septal fossula well marked, situated towards the 
concave or ventral side of the corallum, and not reaching quite to the centre of the visceral 
chamber. Principal sepfa numerous (about forty), very thin, extremely narrow upwards, 
and straight or but very slightly curved inwards; two of them somewhat larger than the 
others, and forming an angle at the end of the septal fossula. An equal number of small 
septa alternating with the principal ones. Height of the corallum 3 inches; depth of the 
calice more than half that length; diameter of the calice 13 inch. 
The only specimen that we have seen was presented to the Geological Society by Lord 
Enniskillen, and had been found by that Palontologist at Loughgill, in the county of 
Sligo. 
This species may easily be distinguished from all the other known Zaphrentis by the 
great depth of its calice and the position of the septal fossula. 
5. ZAPHRENTIS BowERBANKI. Tab. XXXIV, figs. 4, 4a. 
ZaPuRENTIS BowERBANKI, Milne Edwards and Jules Haime, Polyp. Foss. des Terr. Palzeoz., 
p. 338, 1851. 
Corallum very long, almost cylindrical, strongly curved, terminated by a narrow 
peduncle, covered with a strong epitheca, and presenting well-marked circular constric- 
tions, and accretion swellings. Cadice circular. Septal fossula very small, almost central, 
situated towards the ventral or concave side of the corallum, and divided at its basis by 
the principal septum, which extends to some distance in its cavity. Principal sepéa not 
numerous (24), very thin, somewhat unequal, and extending almost to the centre of the 
calice ; rudimentary septa alternating with the principal ones. Height of the corad/wm 
2 or 3 inches; diameter of the cadice, 6 lines. 
Found at Oswestry, at Frome, and in Ireland. Specimens are in the Collections of 
the Museum of Practical Geology, of the Geological Society, of Mr. Bowerbank, and of the 
Paris Museum. 
This species is remarkable for the smallness of its well circumscribed, sub-central 
fossula, and by the way in which one of the primary septa extends into its cavity. By 
the great development of this septum 7. Bowerbanki approximates somewhat to the genus 
Hallia ;: but, in the latter, the septal fossula does not exist. 
1 See Introduction, page Ixvii. 
