Dorothy Hill. 
62 
Two spoeimens from the uppermost Pseudogastrioceras horizon of Lino- 
jyroduclus-Fenestella stage of Wandagee series, are identified as Euryphyllum 
reidi Hill, but they may represent a variant from the morphology characteristic 
of the Calceolispongia zone, for their septa are without any curvature. Never- 
theless, a similar morphology is known in specimens from Castle Creek, Queens- 
land. 
? EURYPHYLLUM, sp. (Plato k, fig. 4.) 
Alatervd : One specimen from locality H 4 E, in the Collection of the 
University of Western Australia from the lowest horizon with a species of 
large Ccdceolispongia, middle Calceolispongia stage, east limb of syncline west 
of Coolkilya Pool, Minitya River. 
Desmpl/ori : The specimen is small and troclioid, the diameter at the 
upper edge. of the calice being 18 mm, with a deep calice and strong longitudinal 
ribbing. (")no side of the corallum, about an alar fossula, is excavate, but 
whetlior from injury or attaclmient it is impossible to say. Major septa only 
are developed, aufl they are considerably <lilated ; there are 7 in each cardinal 
quadrant and 7 in eacli counter (juadrant ; the axial edges of those in the 
cardinal (|U{u:lrants all meet the axial edge of the short counter septum, or 
join the two parallel sejjta about the cardinal fo^siila. There is a lozenge- 
shaped ga[) filled with matrix in the middle of the coral, where the septa of the 
carditiai and couiAter fpiadrants are parted, the greatest width being in the 
plane of the alar fossuhv, and the opposite diameter being between the axial 
edges of the cardinal se|)tum and the counter se])tum. 
Rcinurks : Wliethor this gap is a specific character or a pathological 
conditiou cannot bo determinotl without further specimens. In the meantime 
the s])ecimen is placed doubtfully in Euryphyllum. It might, however, be an 
•aberrant A llolropiophydiifu. 
Genus PLEROPHYLLUM Himle. 
PlerophyllHUi Hinde, 1890, p. 19') ; for references, etc., see Hill, 1937, a, p. 47. 
Genolectotype (chosen Crabau) ; Plerophyllim aiistrale Hinde, 1890, p. 
196, ])L viiiA, figs la-f ; Permian. Gascoyne River ; Irwin River ; Western 
Australia. 
Diagnosis : Small, curved, ceratoid Rugose corals in which the two 
counter-lateral septa, l)oth alar septa and the cardinal se])tum (and some- 
times the counter septum also) are larger and more dilated than the others, 
but equally developc'd among themselves, and are swollen near their axial 
edges, Septal insertion is accelerated in the counter quadrants. 
Plerophyllum sp. (Plate IT., fig. 3). 
Material : One specimen from the Cundlego Series, in the fossiliferous 
horizon above Coolkilya Pool, IVIinilya River. 
Description : The specimen is cylindrical and very small, being the calical 
end (8 mm.) of a specimen, with a constant diameter of 3 mm. Longitudinal 
and growth striations are 'wcll-marked. The two counter-lateral sej^ta, the 
alar septa and the cardinal septum are dilated and meet at the axis, and are 
almost e(pially sfjaced. Shorter septa can be distinguished between them, 
the counter se])tum clearly, but others less clearly. There is a stereozone 
about 0-75 mm. wide at the peri|)hery. 
Remarks : This small s})ecimen may be only a young individual of Flero- 
phyllum australe^ and so ])ending the discovery of more material it is left 
unnamed. No adult P. australe are known from the Wandagee Series. 
