12 Mr. A. W. Waters on Australian Bryozoa. 



This is allied to 8. tumida, but the avicularian chamber is 

 lower clown and does not spread out near the aperture. It is 

 also allied to S. Uidhyi^ MacG., which has recently been 

 redescribed by JuUien as Aimulosia australis^ J. 



Loc. Green Point, Port Jackson. 



Scldzoporella sydneyensis, sp. nov. 



Thei'e Is only a small piece of this Scliizoporella without 

 ovicells. Zoarium incrusting. Zooecia hexagonal, separated 

 by a distinct raised ridge ; the distal portion of the zooecium 

 is much depressed, the aperture wide (0*13 millim.), the lower 

 border of the oral aperture widely emarginate. In young 

 zooecia 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 zooscium 

 is coarsely perforated. 



The zooecia are very similar In several characters to those 

 of Escliara mortisaga^ Stol. (Bry. von Latdorf, p. 86, pi. ii. 

 fig. 6). 



This specimen was first noticed after the plates were drawn, 

 and if the opportunity occurs shoulJ be figured at some future 

 time. 



Since writing the above I 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 

 zooecium is not depressed, and sometimes besides the pair of 

 tubercular spines there are others on the front of the zooecium. 

 These specimens were deteraiined as S. vitrea, MacG., and 

 although the front of the zooecium 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 

 iiicisa of 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 vesh'ta, Hincks, var. australis. (PI. I. fig. 19.) 



Lepralia vestMa, Waters, Anu. & Mag. Nat. Hist. ser. 5, vol. xx. p. 194, 

 pi. 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 L. vestita is shown in fig. 20. 



