Further Pkr.miax Corals from Western Australia. 
63 
Genus VERBEEKIELLA Gerth. 
Verbeehiella Gerth, 1921. p. 81 ; nom. nov. for Verheekia Penecke, in Verbeek, 1908, p. 673 ; 
Verbeeki-a was pre-occupied by Fritsch, 1877, for a Tertiary eehinoid. 
Verbeekia-, Hill, 1937, a, p. 54. 
Genotype : Verbeekia permiea Penecke loc, ciL = Clisiophyllum australe 
Beyrich. 
Diagnosis : Simple Rugose corals typically with much dilated vertical 
skeletal elements ; with a clisiophylloid axial column, with domed tabulae, 
and without dissepiments. 
Remarks : The genus is reported from the Moscovian and Artinskian 
of Russia and the Permian of Timor, and F. talboti (Hosking) occurs in tlie 
Callytharra Stage of tho North-West of Western Australia. Zeliaphylluni 
Heritscli (1936, p. 130, genotype Z. suessl Heritseh, id., text-tig. 34, pi. xvnii., 
fig. 24) from tho Lower Schwagerina limestone f»f tlie Carnic* Aljis may bo 
synonymous. Gramma Hudson (1928, p. 252, genotype rhytoides Hudson, id., 
pi. i., figs, la-g), a Tonrnaisian form of England, may bt? related or synonym- 
ous. It is difficult to know whether genera of solitary coralla with axial 
columns but without dissepiments should be considered as members of the 
family Clisiophyllidae or not ; and for the present they are left as Rugosa 
incertae sedis. 
Verbeekiella mersa sp. nov. (Plate 1., figs. 5, 6 ; plate II., fig. 4). 
Holotype : From fjinoprodiictns-€(ilr.e-ollspongia horizon, just below lowest 
Propwacoceras zone, lower Calceolispongia stage, oast limb of syncline west 
of Coolkilya Pool, Minilya River. Four other specitnens from just above the 
“ worm trai'k horizon, upper Oalceolispongia stage, sanu^ locality. Another 
is from th(i fossiliferous (Jundlego liorizon above (.'oolkilya Pool. 
Diagnosis : Verbeekiella with septa greatly dilat(xl at first, without 
minor septa, with the axial structure tjuite dense, of (lilaH'd lamellae attached 
to the coLintorsoptum. 
Description : Ti-ochokl coralla, about 40 mm. tall with a sliglitly irregular 
curvature and a calical diamcd.er of 20 mm. 13 k* diani{4(‘r is longer along 
the cardinal-counter lino than at right angles to it. 1’he epitlK*.ca is without 
longitudinal striation, but shows growth annulatiori. The cardinal septimi is 
on the longer side, but is not noc^essarily in auy plane of symmetry of tho 
corallum. When the epith(Kja. is woatluu'ed away, slendta- grooves ar(5 seen 
up the middle of each septum. The distal edges of the septa are curved, 
rising up slightly from the epitlioea, and then descending a little in a long 
curve towards the axial edge ; wh(*ri tho corallum is broken v'ertically down 
a septum, lines of growth an^ seen parall<‘l to this curve of tho distal edge. 
The axial structure projects as an elongate boss, which may show labu’al ridges. 
Only major septa are developinl, 20 at a diameter of 1 2 mm., u|j to 26 at greater 
diameters. There is always at least one mon* septum in each counter (|iiadrant 
than in each cai'dinal (|uadriuit, so that tlu^ alar fossulai; tend to be on tlio 
cardinal side of the corallum. Tho septa are flilated so as to bo in contact 
throughout tho young stages, but as the corallum grows tho dilatation lessens 
somewhat ; a narrow pc^riphoral sten'.ozone is always left, and the thinnest 
part of a si^ptum is just inside this steix) izono, so that the septa Uaid to be 
rhopaloid. The counti^r septum is joined with the axial striK'.tun^, which is 
made up of a median lamella and a few lateral lamellae so dilated as to be 
in contact ; very occasionally s])aces may be seen betweim the lamellae ; 
the sides of the structure may bo smooth, so that it is o\ al in section, or ridged 
