Mr. A. W. Waters on Australian Bryozoa. 11 



Schizoporella suhimmersa^ var. nov. 

 (PI. II. figs. 10, 10 a, h, c.) 



This is mudi like MacGillivray's description and figure of 

 Lepralia suhimmersa, but does not correspond with Hincks's 

 more recent figure. The opercuhim of the ovicelligerous cells 

 is somewhat larger than that of the ordinary zooecia, and 

 forms a wide curve on the lower border. The ovicell is 

 deeply immersed. 



From the avicularian chamber there is a lateral tube on 

 each side (see fig. 10 a, a zocecium decalcified). The same 

 thing is often seen in the avicularian chambers of Refejwra. 

 In some of the older zocecia the opercula are whitish, in con- 

 sequence of a slight subsequent calcareous deposit. 



Loc. Victoria ; Green Point. 



ScJn'zoporeUa arnhi'ta, sp. nov. (PI. II. fig. 7.) 



This occurs from Green Point and is in many points simi- 

 lar to S. lata, MacG., also abundant from the same locality ; 

 but the differences in the ovicells and avicularia enable them 

 to be distinguished. 



Zoarium incrusting. Zooccia ovate, distinct, with moderate- 

 sized deep pores on the front, a small round avicularium 

 immediately below the aperture. Oral aperture suborbicular, 

 with the proximal edge subtriangular. Ovicell wide, raised, 

 the front flat, with numerous pores, the rest of the ovicell 

 imperforate. 



This I have from Naples with and without the small round 

 avicularium : and a specimen from Port Western, Victoria, 

 sent to me as S. lata? has the characteristic ovicells and 

 avicularia. 



Probably this has been placed with S. pertusa. 



In some cases a calcareous growth in the older zooecia forms 

 a kind of lip in the lower part of the aperture. 



Schizoporella lavigata, sp. nov. (PI. II. fig. 8.) 



Zoarium incrusting. Zooecia small, separated by an indis- 

 tinct division, surface smooth. Avicularium tumid, directed 

 forwards, mandible round with a central lucida and the distal 

 end dentate ; in the older cells the avicularium occupies nearly 

 the whole of the front of the zooecium. The oral aperture 

 is nearly orbicular, the sinus (?) being formed by an arc 

 nearly the width of the aperture, and on each side there is a 

 minute denticle. 



Ovicell short, much raised, situated considerably above the 

 aperture, widely open, and not closed by the operculum. 



