Further Pekmiax Corals fho.^i \V ester x A listraiaa. 
()5 
Remarlcs : Tho genus is widespread, from the Upper Ordovician to the 
end of tho Devonian ; forms like Favosites in the Carboniferous have usuaJly 
been referred to Emmonsia, but Gerth (1921) has des(*ribed as Favosites tliree 
Permian species from Mandco and tho Middle Permian of Basloo, Timor. 
FAVOSITES, sp. (Plato II., fig. 5.) 
Material : Two specimens from tlio base of the lAnoproduchis stage of the 
Wandageo series, centre of synclino west of Coolkilya Pool, Minilya River (one 
near Station 4A, t'.o other 12 chains from Station f of 1939 survey). 
Descri'ptioyi : The corallum is tuberose, 30 to 40 nmi. in diameter, and 
50 mm, or more long. The individual corallit(>s diverge outwards from the 
axis, each being about 1*5 to 2mm. in diameter, though smaller ones occur. 
Owing to the ])rocesscs of fossilisation, lautlua* spi^cimen is wortli sectioning. 
Neither mural jioros nor septal spines wi're provi'd, but one surface suggests 
a single vortical row of pores per wall. Tabulae ari^ thin, slightly domed, 
and rather distant, 3 in 2 mm. 
Renmrks : The specimens ilo not appear to be conspi^eific with the species 
desci'ibed by Gertli from Timor, or with any other species known to me. 
Genus THAMNOPORA Stoiiiinger. 
Thamno'pora Steininger, 1831, p. 10 ; 1834, p. 337 ; for references, etc., see Kill, 1937 
a, p. 56. 
Genoleciotype : Thanmopora madreporacea Stoininger Alveolites ccrvi- 
cornia de Blainville, 1830. 
Diagnosis : Ramose Tabulate corals in which the cylindrical branches 
may be flattened and coalesced ; the corallites are typi(?ally polygonal, they 
diverge from the axis of the branch and usually o]>(^n normal to the surface ; 
the corallite walls are dilated throughout, and llie dilatation increases dLstally ; 
typically the growth lamination in the scleronchyme of the wall is obvious, 
while its tibrous nature is not ; septal spim^ are usually obsolotix and mural 
pores are large. 
Range : Silurian, Devonian, Permian, and rare in the Trias. 
Thamnopora immensa Hill (Plate 1., fig. 8 ; Plate II., tig. 6). 
Tham.noporo. immensa Hill, 1937a, p. 58, pi. i,, tigs. 21, 22, text-fig. 9 ; Permian, two 
miles East of Christma.s (’reek Homestead, south of Rough Range, Kimberley. 
Holo'ype : H 25, Geological Survey of Western Australia. 
Diagnosis : Large Thamnopora, in which the corallites have calices of 
t\vo sizes opening at right angles to the surface of a brancli, excessively dilated 
walls, thin tabulae, anti nmnerous large, ngular mural pores, frecpiently 
further excavated by boring organisms. 
Remarks : Additional specimens, from Btiolgadoo Pool, Minilya River, 
and from Coolkilya Flat, south of the Minilya River, probably from th(> lower 
part of the Linoprodnctus stage of the Wandagee sei-ies, were sent by Dr. 
Teichert. They have allow^xl an expansion of tho diagnosis given in 1937. 
The specimen from Boolgadoo is nnweathered, and large corallites are seen 
between smaller ones on the calieal svirface. The calices show' eight or nine 
coarse radial ridges, somewhat as in Striatopora Hall ; the ridges are without 
