23 
the regularity and frequency with which these dissepiments hranch from the 
septa produces a spurious hut somewhat crenulated appearance, reminding 
one at first sight of the genus Helioj^hyllnm (PI. X, Pig. 15). Cut edges of 
tabulae are visible in the central area, and would seem to show that the 
latter were either undulating or vesicular. The great regularity of the 
secondary septa and dissepiments between them reminds us of Cyathophylliim 
inversum, De Koniuck, but the septa in the present instance are far more 
numerous, and other peculiarities of the dissepiments described by Pe 
Koninck are absent. 
The fossula is not distinctly visible. 
Locality and Horizon . — Binge Berry, Bouchcl Brook, Hunter Biver, 
Co. Durham ( C. Cullen') : — Horizon doul)tful, but probably Carboniferous. 
Family— CLISIOFH YLLIDyE. 
Ohs . — Under the name of Axopliyllum Thomsoni^, Prof. De Koninck 
described a coral from Jervis Bay and Colocolo appertaining to this family, 
but I regret I have not seen it. 
AULOPHYLLUM, Edwards and Eaime, 1850,“ 
(Mon. Brit. Boss. Corals, Tnclrod., 1850, p. Ixx.) 
Aulopiiyllum Davidis, sp. nov, 
PI. X, Figs 10-12 ; PI. XI, Figs. 1-3. 
Sp. Char . — Corallum very large, cylindrical, and much curved, with 
ill-defined irregular growth annulations. Septa fifty-eight to sixty, and an 
equal number of secondary lamellcc, straight, somewhat thickened, and the 
former equal to rather more than one-third the diameter of the corallum in 
length, the latter barely half the length of the primary. Peripheral area of 
the corallum, or interseptal space, narrow, the dissepimental vesicles rather 
small, closely packed, and apparently somewhat weak ; intermediate area, or 
interlocular space, composed of irregular large concave vesicles, the secondary 
septa passing on to, but hardly beyond this area ; interlamellar space, or 
' Fos.s. Pal. Nouv. Galles du Sud, 1877, Pt. .S, p. 14.S, t. .S, f. 3. 
" Emended, Duncan and Thomson, Quart. Jourii. Geol. Soc., 1SC7, XXIII, p. 327. 
JloEO— 01 E 
