174 
Joan M. CiiOCKFOKo. 
show five or six 
so thiek as the 
emisepta are de~ 
1 I); tliev show 
strule and one diss(*pinu>nt, and these are j»-enerally regularly plaeed, with 
one op])osite the end of each (!isse])iinent, and one at the centre of each 
fenestrule, hut one S])eciinen shows slight irregularities in the placing of the 
apertures. The feneslndes are hourglass-shai>ed or oval, and are from 
0-4 to 0-hl mm. in length and from 0 14 to 0-25 mm. in width ; the dissepi- 
ments are from 0-11 to 0-J mn'i. in width, and the length of one fenestrule 
and one dissepiment is from 0-51 to O-Td mni. The reverse surface is not 
shown in specimens from tin* type locality, hut si)ecimens from the highest 
beds ol the Nooncanhah seu'ies at Ml. IMarmion, and from tlie Calceolis])ongia 
Stage of the Wandagee Sen-ies on tlu‘ Minilya Kivei- show that the reverse 
surface of the hranclies is ornamenttHl hy \ery numerous, large, irregularly 
t>laced tuhercles; the inner layers of the r(‘vei*se surface 
line longitudinal striae'. Tlu' dissepiments are not (piiti 
hranclies. Sections show that hoth superior and inferioi' 
veloped; the shape of tlu' zooecia is shown in Text-tigun 
a greater resemblance to those described by Nikiforova (lOJJ, ]>. 13) for 
the FenestreUi^m dov.aiea grout) thosi' of other forms. The tubercles 
of the reverse surface show in sections as rounded areas of lighter colour. 
Bifuri'ation generally occurs at infreijuent intervals, but may occur within 
3 mm.; increase' to Ihrei' rows ol zoot'cia occurs imnu'diately before branch- 
ing. 
K(*marks: 1 his species is probably the form described by Miss Ilosking 
(1031) fj'om tin' M ooramel Rivei' Disti'ict as Fenestella horologia Bretnall, 
but it differs from F. horologia in Inning a double, instead of a single, row 
of nodes. It occurs in the Sjiringsure District, Queensland (Consuelo Ck., 
two miles abo)e Cattle Ck.: Heid, 1930, p. 157, locality 9). Fenestella 
<‘onmdi var. compactdis (’ondra, fi’om the Upper Pennsylvanian and 
Lower Pei’inian of Kansas and Nebraska, is dift'erentiated by having 
less regularly arranged ai>ertures and smaller nodes, which may 
not always be placed in {\yo r<iws, as they are shown in Condra^s figures; 
the measurements and figure's given by Condra for thi.s species do not al- 
ways corres])ond. Fenestella bispinnlata Moore, from the Upper Penn- 
sylvanian of Kansas, is a smaller species, and diffei's in the a])])earance of 
the reverse surface. The s])ecif-s recoreh'd as Fenestella pereJegans Meek 
from the Middle Pi'oductus Liim'slone of the Salt Ranges by Waagen anti 
Pichl is slightly finer than this species, as was noted by Miss Hosking, and 
possibly shows a rather higher carina : tlu* reverse surfaces of the specimens 
examined by AVaagen and Pichl wt'i’c very much weathered; it is possible 
that these two species art* identical. Fenestrellina pereJegans (Meek), from 
the (’oal Mt'asurc's ot Nebraska, ]>ossessed only a single row of nodes on the 
t'arina. 
Minilya princeps sj). nov. 
Idate 1. Pig. 1. 
Holotyju*: S])ecim(*n 20945, I'niversity of Western Australia Collection. 
(Coll. A. Wade.) 
Horizon and locality: Nooucanbali Series; Keevie’s AVell, 8 miles north 
of Mt. Anderson Homestead. 
Minilya idth three zooeeda to a fenestrnle ; carina almost obsolete; nodes 
small, in tico rows on the carina. 
The form of the colony is not shoAvn ; there are from 10 to 10-5 
fenestrules vertically, and 17 branches horizontally, in 10 mm. The branches 
