Hhvozoa krom the VV'am)A(;kk and Xooncanraii Skrirs 
( Pkrmian) of Western Austraei a. 
the branches show fairly large, rather indistinct tubercles on the reverse 
surface. The lateral margins of each branch are angular. Bifurcation may 
occur at intervals of about T mm., but is usually much less freqiumt; increase 
to thi’('e rows ofc‘ zooecia occui's immediately before branching. 
Bemarks: This s]>ecies is distinguished from described species of similar 
size by its large, widely spaced nodes. 
Fenestrellina ruidacarinata sp. nov. 
Plate 2. Figs. 1, 2. 
llolotype: Sj)ecinien 2707a, ruiv(u*sitv of Western Australia Collection. 
(Coll. IT. W. B. Talbot). 
.Horizon and locality: Nooncaubah Series; !) ni. Fj-N-E. from Trig. Stn. 
Cr2, St. George’s Itange. 
Fenestrellina with three to four zooecia to a fenestrule; carina low^ 
nodes rounded^ contkjxious, five to six in the length of each fenestrule. 
The form of the colony is not shown; there ai‘e K> branches horizontally, 
and 10 to lO o fenestrules vtu'tically, in 10 miu. Tlu‘ branches are sti*aight, 
and are rather rounded on the c('lluliferous surl‘a('e; the apertures are ])laced 
on the sloping sides of the bi’anches, but do not i)roject into the fenestrules; 
the width of the branches is from 0-23 to 0.38 mm. The carina is almost 
obsolete, and is com])letely covered I)y the nodes, Avhicli are low, rounded, 
and contiguous, and which vary in diameter, though they do not vary in 
height, except as a result of weathering, which may remove all traces of 
the divisions between adjacent nodes and leave only a slight ridge along the 
centr(‘ of the ]>ranch. Five to six nodes occur in the length of each f(mes~ 
trule; the distance between the centres of successive nodes is from 0 1 3 to 
0-22 mm. The apertures are circular, 0-11 mm. in diameter, and are sur- 
rounded l)y distinct, but only slightly raised, ])eristomes; three apertures 
occur in the length of each fenestrule, and an (>xtra one may occur opimsite 
the dissepiment; the distance between the centres of successive a)KU’tures is 
from 0-24 to 0-3 mm., and about thirty-(‘ight Jipertures occur in 10 mm. 
The fenestrules are oval, j’rom 0-(i to Own mm. in length, and from 0-24 
to 0-35 mm. in width, and tin* dissepiments av(' from 0-21 to 0-27 mm. in 
width. On the celluliferous surface each disse])iment shows one or two 
strong transverse furrows. The reverse surface is not shown. Bifurcation 
occurs at intervals of more than 5 mm.; increase to three rows of zooecia 
occurs within one fenestrule before branching. 
Kemarks: The numerous low, contiguous nodes distinguish this form 
from any describ(*d Permian specie's. Fenesirellina inaequalis (Ulrich), from 
the U])per Coal Measures of Illinois, is similar in a])pearanc(* ; it is, how- 
ever, a large'r s])ecies, wdth rather more zooecia to a fenestrule, and shows 
smaller and much more* numerous nodes. 
Fenestrellina valentis sj). nov. 
Plat(* 1. Fig. 4. 
Holoty[)e: Specinu'u 2703c, Uui\(*rsity ol‘ 
(Coll. H. *W. B. Talbot). 
Horizon and localitv: Xhauicanbah Sei’ies 
Western Australia Collection. 
()V 2 m. North of !Mt. Ander- 
son, 
