BRY0Z0A FROM S.W. VICTORIA, AUSTRALIA. 



329 



important, and by which it may be recognized again should it be 

 found elsewhere. 



The aperture is orbicular, with a mucro turning inwards over the 

 aperture. On each side, below the aperture, there is a large avicu- 

 larium, also one on each side two thirds of the distance from the 

 next aperture. Above the aperture there is a raised area with a flat 

 surface, apparently an ovicell. Above the ovicell and down the sides 

 of the zocecium there is a row of large pores. 



The peculiar flatness of the ovicell is not shown in the drawing. 



A specimen sent over to the British Museum by Mr. Hutton from 

 New Zealand, marked and mentioned in his catalogue as Lepralia 

 variolosa, seems to be this species. In the recent species the ovicells 

 have a small umbo, and there is not a second pair of avicularia 

 guarding the ovicells ; but the position of the upper avicularia is 

 the same, and the shape is similar. M. duplicate also occurs from 

 Mount Gambier (Lond. Geol. Soc. coll.) with the zoarium erect, cy- 

 lindrical, with one cell turned in each direction. 



30. Mucrokella elegans, Macg., var. ? Plate XVIII. fig. 91. 



? Eschara elegans, Macgillivray, " Austr. Poly." Trans. Roy. Soc. 

 Vict. pt. ii. vol. ix. 1869, p. 138. 



Zooecia quadrate, surface finely granular with pores, except just 

 below the aperture, a round avicularian pore immediately below the 

 aperture. Oral aperture rounded on the distal edge, the proximal 

 edge arched, forming a lip, a minute denticle on each side of the 

 mouth immediately above the angles. Aperture 0*17 mm. wide ; 

 O'l long from the top of the lip to the distal end of the aperture. 



Only tAvo cells are preserved ; and therefore it is impossible to be 

 sure of even the generic position of the specimen ; but it is evidently 

 related to the species from Queenseliff and Portland Bay, described 

 by MacGillivray as Eschara elegans, a name that should not have been 

 given, as there is already E. elegans of Milne-Edwards. In E. elegans, 

 MacG., no suboral avicularia are mentioned ; but according to Mac 

 Gillivray avicularia are sometimes situated at the side of the mouth. 



31. Microporella violacea, Johnst., var. fissa. Plate XV. fig. 26 ; 



Plate XVII. fig. 73. 



Microporella fissa, Hincks, " Contr. Gen. Hist, of Mar. Poly.,' 

 Ann. & Mag. Nat. Hist. ser. 5, vol. vi. no. xxxv., Nov. 1880, p. 381, 

 pi. xvii. fig. 4. 



Zoarium in Eschara-form, flat, compressed. Zooecia pyriform 

 or oval, much raised, surrounded by a row of pores, or in old and 

 worn cells covered with pores ; a raised protuberance on each side of 

 the zocecium a little lower than the oral aperture; an avicularium 

 immediately below the aperture, sometimes turned to the right, some- 

 times to the left ; immediately below the avicularium there is a deep 

 depression, and the opening of this depression seen from the interior 

 is found to be an elongated denticulate pore (see fig. 73). Oral 

 aperture rounded on the distal edge, straight on the proximal, 0*07 

 mm. wide. 



It will be seen that this resembles the form of M. violacea called 



