8 
detailed description, but it is evident that the septa were short, after the type 
of the genus, and about twenty in number ; the tabiilaB close, about half a 
line apart ; and the corallum conical and curved at the base. 
LocalUxj and Horizon. — Pallah (f mile S.W. of), Horton River, Co. 
Murchison ((7. Ctdleii) : — Carboniferous. 
Genus — ZAPlIPtBNTIS, Hafuiesque and Clifford, 1820. 
(Aun. Sci. Phys. Pruxellcs, V, p. 23f.) 
Ohs. — Hr. G. J. Ilinde has recently described a genus of West 
Australian corals from the Carboniferous as 'Flerophyllum,’^ to take the place 
of He Ivouinck’s FentapJujllum, previously occupied. The essential characters 
of his genus arc, — (1) the extra-development of four or live prominent septa ; 
(2) the infilling of the intcrlocular s]iaees and centre of the corallum with 
successive layers of stereoplasma ; and (3) the presence of a thick outer wall 
consisting apparently of the coalesced parietal margins of the septa with an 
outer epithccal layer. The second and third characters are highly developed 
in our N. S. "Wales Zaphrontoid corals, and could I have satisfied myself of 
the preponderance of four or five septa over the others, in the manner shown 
in Hr. ITinde’s figures, I should unhesitatingly have adopted his genus ; but 
such does not appear to be the case, although there is, as explained in the 
specific descriptions, an undoubted grouping of the septa, usually into four 
bundles. In the meantime, I shall content myself by publishing our species 
with the additional name of jPlerophyllum, placed after that of Zaphrentis, 
with the view of drawing attention to their close affinity to the latter. On 
tlie other hand, if our species arc distinct from the absence of these specialised 
septa, and equally separated from Zaphrentis by the stereoplasmic deposit 
(well shown in our PI. VIII, Pigs. 7 and IG), which appears to completely 
fill the lower portions of the corallum with solid tissue, they may, perhaps, in 
the future be known under the name of Hemizaphrentis. This heavy 
deposit of stereoplasma to some extent allies the present corals to Lindstromia, 
Kicholson and Thomson,® in which “the lower portion of the visceral chamber 
(is) often more or less completely filled up by the deposition within it of solid 
'This locality was described by the late Samuel Stutchbury in his *' Tenth Tri-monthly Report on the 
Geological and Mineralogical Surv^ey of N. S. Wales” (N. S. Wales Leg. Council Papers, 1853, No. 235 A, pp. !) 
— Sydney, fcap., 1853), p. 6, and wherein he gave a list of about thirty species of fossils found there. The 
horizon is at present doubtful. 
2 Geol. Mag., 1890, VII, p, 105. 
^ Proc. R. Soc. Edinb., 1876, I.X, No. 95, p. 149. 
