Further Permiax Corals fro:m Western Australia. 
59 
Timor a group occurs which differs from the earlier ampleximorph.s in ha^dng 
dilated septa usually swollen a little axially, and continuous vertically thr<nigh- 
out that outer part of the tal:)ularium where the edges of the tabulae are down- 
turned. Small septal ridges may continue for a short distance over the upper 
flat surfaces of the tabulae. Usually minor septa are absent. Sucli are some 
small specimens in the Sedg\vick Museum, C'ambridge, and a large form figured 
as Am.plexus comlloides by Oerth (1921, p.l exlvu, figs. 22. 22) from the Upper 
Artinskian of Bitauni, 'fimor. Other Permian amjdeximorphs, which ajjpoar 
to have been derived from zaplirentoids by the withdrawal of tlie sei)ta from 
the axis have been called Paracaninia Chi (1927, p. 93) ; })ut these have thin, 
une({ual septa, nut swollen at their axial edges. Others again, whicli appear 
to have an aulos, have been called Ainplexocarinia Soshkina (1928, p. 379). 
Yet others, with unequal, rhopaloid septa, have been called Am.plextis by 
Oerth (1921) and Heritsch (1937). 
“ Amplexus ” pustulosus Hudlestou. (Plate 1., fig. 1.) 
AmpUxus? pusiulosus Hadleston ; for references, see Hill, 1937ta, p. to, pi. i, fig. 1 ; text- 
fig. 1 ; “ Fossil range,"’ Gascoyne River, Permian. 
Diagnosis : Erect, turbinate Rugose corals with the major septa dilated 
an.d laterally contiguou;*, leaving a wide axial area free of sejha. 
Remarks : One specimen from the upper part of the Callytharra series 
near Trig. Station K52, Kennedy Range, near Willi aml>uj*y — Middalya road,, 
W^A., is probably a member of tliis species, although it is curved rather than 
erect, and cylindrical rather than turbinate. It is flattened in the plane of the 
cardinal septum, j»robahl 3 ^ by crushing, as the ta])ulae seen in a \^ertical section 
are somewhat shattered. There are 33 septa at a diameter of 15mm. x 1 8mm., 
extending a little over liaif way to the axis, sub-etjual, some with sJiarp axial 
edges, and some with swollen axial edges, all dilated so as to be almost in 
contact laterally. The cardinal septum is shorten’ than the rest and is on the 
longest side of the eorallum. No minor septa are developed. The tabulae 
are complete, shallow domes. Etlieridge has ah’eady mentioned tins species 
fix^m W illiambury Station, Minilya Hiver. 
“ Amplexus ” s]). (Plate II., Hg. 1.) 
Material : One specimen from the Permian of Fossil Cliff, Irwin River, 
in the collection of the UniversiU^ of Western Australia. 
Description : Tlie specimen is an obIi.|uelv broken fragment (iO mm long, 
and 32 mm in diameter. There are alKuit 59 sligiitly dilated major se|)ta, 
continuou.s vertically for about 5 mm. from the ei)it liecu. and then extending 
for a short distance over the Uf)per flat siadaces <iniy of the tabulae as faintly 
marked rklges. The septa appear to be sligiitly rho])aloitl, i.e., swollen at the 
inner edge of their verti(‘ally continuous porti<ms ; as far as can ])e seen from 
the fragment, tliey are etpial, and there are no minor septa. Tlicre is a 
peripheral storeozone about as thick as the septa. Tlie tabulae are complete, 
unequally distant, up to 3 mm. a|)art, and with an edge 5 mm. wide, down- 
turned to the storeozone at about 45®. It is in tiiis area of doAvnturning that 
the septa are vertically continuous. 
Remarks : As far as one can ascertain from the fragment, the scjita are 
equal, so that the specimen does not belong to J^aracaninia ; neither is there 
an internal wall, so that it is not A'tnjdexorarinia, and pending further inv^esti- 
gations in Carboniferous and Permian ainpleximoj-plis, it is referred to 
