ALDIXGA A^D THE RIVER-MUREAT CLIFFS, SOUTH AUSTRALIA. 301 



Mijriozoum honolulense, Busk, ' Challenger ' Report of Polyzoa, 

 p. 170, pi. XXV. fig. 2. 



Specimens from the Eiver-Murray Cliffs occur as hollow cylinders 

 of about the same size as those from Bairnsdale. The dorsal surface 

 is divided into oblong zooecial areas. The rosette-plates are at the 

 base of the zooecial wall, with, normally, two distal plates. 



Loc. Fossil : Bartonian of Val di Lonte & Perrara di Monte Baldo 

 (Italy) ; Curdles Creeks ; Bairnsdale and River-Murray Cliffs. 

 Living : Sandwich Islands, 20-40 fathoms. 



52. SCHIZOPORELLA STRIATULA, Smitt. 



Gemellipora striatida, Smitt, Eloridan Bryozoa, pt. 2, p. 37. pi. xi. 

 fig. 207. 



The surface of the specimen from the Eiver-Murray Cliffs is 

 smoother than in the Floridan specimens, and the pores are not so 

 distinct ; but the size is the same, with the oral aperture also 0*06 

 miUim. wide, and there is the same characteristic prolongation of 

 the zooecia, with a small round opening at the end. 



Loc. Living. Florida, 68 fathoms. 



53. SCHIZOPORELLA FEKESTRATA, WatCTS. 



ScTiizoporella fenestrata, Waters, Quart. Journ. Geol. Soc. vol. 

 xxxviii. p. 399. 



A fossil from the River-Murray Cliffs has smaller zooecia and a 

 smaller aperture (0-13 millim.) than the one from Curdles Creek, 

 and should perhaps be called var. minor. It has the surface 

 coarsely granular and covered with pores ; the aperture is deeply 

 sunk, and there is frequently on one side a little below the aperture 

 an avicularium with a round aperture, which in some cells is re- 

 placed by a very large raised avicularium covering the whole cell. 

 The opening of this avicularium is triangular, with a tooth from the 

 cross bar, and is situated at right angles to the axis of the zoarium. 



Loc. Curdles Creek ; River-Murray Cliffs. 



54. SCHIZOPORELLA Cecilii, Aud. 



Flustra Cecilii, Aud. ; Savigny, Egypte, pi. viii. fig. 3, p. QQ. 



55. SCHIZOPORELLA PROTExsA, sp. nov, (PL YII. fig. 14.) 



In Lepralia-form growing on Microporella elevata. Zooecia regu- 

 larly placed, hexagonal, slightly rounded, with a row of large pores 

 round the edge, and with subtriangular avicularium directed outwards, 

 on one or both sides about halfway down the zooecium. Aperture 

 (0-2 millim. wide) rounded at the distal end, below straight with a 

 distinct sinus. 



Loc. Aldinga. 



bQ. Mastigophora Dutertrei, Aud. 



Mastigoplwra Butertrei, FQncks, Brit. Mar. Polyzoa, p. 279, 

 pi. xxxvii. figs. 1, 2. 



Specimens from the River-Murray Cliffs and Aldinga are of about 

 the same size as these figured by Mr. Hincks, but the ovicells are 



