Mr. A. W. Waters on Australian Bryozoa, 185 



that Hagenow (Bronn's Jalirb. 1839, p. 269, pi. iv. fig. 7) 

 Lad called a fossil Gellepora tripunctata. From the figure 

 and description it, however, seems like M. Lacroixii, And. 



Loc. Fossil : Mt. Gambler. Living : N.E. Australia, 

 23 fath. {Br.) ; Holborn Island ; Broughton Island (N. S. W.) 

 {Miss Jelly coll) . 



^2. Diploporella cincta (Hutton). 



Membranipora cincta, Hutton, Trans. Hoy. Soc. Tasmania, 1877, p. 23, 

 Diplopora cincta, MacGr. Trans. Roy. Soc. Vict. vol. xvii. p. 1, tig. 1 



(April 1880). 

 Diploporella cincta, MacG. ibid. vol. xxi. p. 98. 

 Membranipora t?rmsversa, Hincks, Ann. & Mag. Nat. Hist. ser. 5, 



vol. vi. p. 89, pi. xi. fig. 9 (July 1880) ; ser. 5, vol. vii. p. 154. 



I adopt the genus Diploporella raerelj for convenience, as 

 I am not sure whether it should be retained, and there 

 seems to my mind too great a tendency to divide uptheStega- 

 noporellida3, instead of making Mioropora more comprehen- 

 sive ; but a more critical study may alter my opinion. 



Loc. QueensclifF and Portland, Victoria ; Bondi Bay, 

 N. S. Wales. 



33. Micropora perforata (MacG.). 



Membranipora perforata, MacGillivray, Trans. Phil. Inst. Vict. 1859; 



Zool. of Victoria, dec. iii. p. 29, pi. xxv. fig. 2. 

 Micropora perforata, Waters, Quart. Journ. Geol. Soc. vol. xli. p. 290. 

 Membranipora stenostoma, Busk, Cat. Mar. Polyzoa, p. 60, pi. c. 



fig. 1. 



Sow-and-Pigs Reef, Port Jackson. 



34. Micropora ratoniensis^ sp. nov. 

 (PI. IV. fig. 5.) 



Zoarium small, articulated, with a longitudinal row of 

 zooecia on each of the four sides. Zooecia arranged diagonally, 

 with a minute triangular avicularium by the side of each. A 

 pore on one side below the aperture. 



This from its size and general appearance would be placed 

 with Setosella, but /Setose/Za is described as with vibracula; how- 

 ever, Mr. Hincks (Ann. & Mag. Nat. Hist. ser. 5, vol. vii. p. 155) 

 at first considered Vincularia abyssicola, Sm., to belong to 

 Setosella ; but surely the organs there are avicularian, and 

 the mandibles have wings like those of Membranipora angu- 

 losa^ Rss., &c. Setosella Folini, Jullien (Bull. Soc. Zool. 

 t. vii. 1882, p. 27, pi. xvii. figs. 63-65), is a uniserial free 

 Setosella^ but is not described as articulated, though, if de- 

 scribed from a small fragment, this might not be seen. 

 These two species indicate that the genus Setosella will have 

 to be given up. 



Ann. & Mag. K Hist. Ser. 5. Vol. xx. 13 



