12 Mr. A. W. Waters on Australian Bryozoa. 
This is allied to S. tumida, but the avicularian chamber is 
lower down and does not spread out near the aperture. It is 
also allied to S. Ridleyi, MacG., which has recently been 
redescribed by Jullien as Aimulosia australis, J. 
Loc. Green Point, Port Jackson. 
Schizoporella sydneyensts, sp. nov. 
There is only a small piece of this Schzoporella without 
ovicells. Zoarium incrusting. Zocecia hexagonal, separated 
by a distinct raised ridge; the distal portion of the zocecium 
is much depressed, the aperture wide (0°13 millim.), the lower 
border of the oral aperture widely emarginate. In young 
zocecia there is a thick ridge below the aperture, but in older 
ones the two ends are raised and form a stout blunt spine at 
each side below the aperture. The front wall of the zocecium 
is coarsely perforated, 
The zocecia are very similar in several characters to those 
of Eschara mortisaga, Stol. (Bry. von Latdorf, p. 86, pl. il. 
fig. 6). 
“This specimen was first noticed after the plates were drawn, 
and if the opportunity occurs should be figured at some future 
time. 
Since writing the above J have had the opportunity of ex- 
amining, in Miss Jelly’s collection, older and larger colonies 
of what is no doubt the same thing; but in these the front of 
zocecium is not depressed, and sometimes besides the pair of 
tubercular spines there are others on the front of the zocecium. 
These specimens were determined as S. vitrec, MacG., and 
although the front of the zocecium is distinctly perforated, and 
not “granulated,” most of the characters correspond with 
those given by MacGillivray, but his figures and descrip- 
tions are insufficient. 
In my ‘Challenger’ Suppl. Report I considered that the 
incisa ot Busk was the vitrea of MacG.; but I may have been 
misled by insufficient figures, and in the uncertainty it will be 
best for the present to allow the name sydneyensis to stand. 
Lepralia vestita, Hincks, var. australis. (PI. I. fig. 19.) 
Lepralia vestita, Waters, Ann. & Mag. Nat. Hist. ser. 5, vol. xx. p. 194, 
pl. vi. fig. 21. 
Since writing my previous paper I have had the opportu- 
nity of further examining Tahiti specimens, and think that 
the New South Wales form should be separated as a variety. 
The operculum of the typical Z. vestita is shown in fig. 20. 
