60 
Dorothy Hill. 
“ Am plexus . It seems close to Amplexus corallokhs of Gerth non Sowerby, 
from the Upper Artinskian of Bitauni, Timor, but it differs from the Lower 
Carboniferous Amplexus eorallohles J. Sowerby in having the septa dilated 
and not attenuate, and in having the vertically continuous segment of the 
septum much wider. 
ZAPHRENTIMORPHS. 
Zaphrentimorphs have been discussed recentlv (Grabau, 1928 ; Hill, 
1938). 
Genus ALLOTROPIOPHYLLUM Graban. 
Allofro'piophylhnn Grabau, 1928, [). 130. 
Genotppe. (by designation) ; Amplexus spinosus de Koninck var. sinensis 
Grabau, 1922, p. (>4, pi. i, figs. 22a, 22b, 23. Chihsia Limestone Chihsiashan, 
Central Cliina (= Artinskian). 
IJifignosis : Simple Rugose corals, typically curved, and bearing scattered 
spines. The septa of the counter (juadrants and sometimes the alar and first 
meta-se])ta are grouped in a narrow crescentic area, embracing the counter 
side of tile (‘orallum ; the remaining septa of the cardinal ijuadrants are 
directed towards a point or points on its inner side, which is roughly midway 
between the nxis of the corallum and the eyntheca. The septa I^ecome amfdex- 
•oid in late stages. Tabulae are usually far apart, com])lete and obIi(jue, with 
a downtiirned iiordor of the same width as the crescent ; they sIo]:)e down- 
wards from the convex to the concave side of the corallum. There are no 
disse])iments, and Tuinor se[)ta are develofied very late or not at all. 
Retuftrh's : The genus is known in the Tournaisian of Belgium, the Dinant- 
ian and Lower Xamurian of Scotland, the Artinskian Chihsia limestone of 
China, and the U])|)er Permian of Ujoulfa in Armenia, Possible synonyms 
of the genus are discussed in tiie authors " (^arlioniferous Rugosa of Scotland, 
Part III.’ , in course of [uiblication by the Palaeontfigraphical Socletv of 
-London. 
ALLOTROPIOPHYLLUM, sp. (l>latc 1., fig. 2.) 
Materud : One specimen in tlie collection of tlie University of Western 
Australia, from the lowest horizon with large sjjecies of CUdceolispongUp mid<Lle 
Calceolispongia stage, east liml> of syncline west of Coolkilya Pool, Minilya 
River. 
Description : Tlie specimen is broadly trochoid, with a talon, and a very 
<leep calice. 'The epitlieca is longitudinally ribhefl hut somewhat weathered, 
the deep grooves (‘orrespoiiding to the major septa lia'S'ing shallow grooves 
between then hulicating tlie potential [iresence of minor septa. Spines were 
not observed. Six major se|.itii in each counter-()uadrant are joined with 
the counter septum in a crescentii* (uirv'e on the counter side of the corallum. 
Six straight metasetJta in eat'h cardinal ipiadrant join at their axial edges at a 
point on the etlge of the cres(*ent, leaving a wide closed fossula expanded 
axially. Tlie long cardinal septum wanders over the fossula to join it at one 
side of the crescent. The si'pta are all slightly a 2 id etiually ililated, and there 
is a narrow peripheral stereozone. No minor septa are visible. The arrange- 
ment of the tixhulae is not known. 
Eemarks : The one specimen is insufficient for a full specific description 
or comparison with other species. Tlie age indicated is that of the genus, 
C'arbouiferous and Permian. 
