Mr. A. W. Waters oti Australian Bryozoa. 261 



of course quite different ; but so long as we are in a tenta- 

 tive stage with the Cyclostomata I do not see that a form in 

 which the zocecia are gathered so distinctly into rays or ridges 

 can at present be united with Diastopora. 



This is no doubt nearly allied to the fossil from Aldinga 

 which 1 described as Discotuhigera clypeata^ Lamx, (Quart. 

 Journ. GeoL Soc. vol. xl. p. 690, pi. xxxi. figs. 15, 16, 19). 



Loc. Port Phillip and Port Phillip Heads ; Double Bay, 

 Port Jackson, " under stones." 



88. Lichenojjora novce-zelandice (Busk). 



(PI. VII. fig. 8.) 



Discoporella novce-zelandice, Busk, Cat. Mar. Pol. pt. iii. p. 32, pi. xxx. 

 fig. 2 ; Haswell, Cyclost. Polyzoa from Port Jackson, Proc. Linn. 

 Soc. New South Wales, vol. iv. p. 353. 



The description of Busk leaves it somewhat uncertain as 

 to whether this is the species intended, and where the ovicell 

 is undescribed this will often be the case. 



Where there is no ovicell the zooecial tubes run into the 

 centre, the central depression forming an inverted cone with- 

 out cancelli j in this respect these specimens differ from Mr. 

 Busk's figure. The outer cancelli are formed of bars from 

 the radii, and there is usually only one row of cancelli be- 

 tween the radii. The inner side of the peristome is the longer, 

 sometimes the outer zocecia have the peristome wide and 

 acuminate in the centre. The ovicell is considerably raised 

 and occupies the whole of the centre ; the central portion is 

 flat and is bounded by a raised meandering ridge, from which 

 the sides slope steeply down. The aperture of the ovicell is 

 near one end of the flat space and is semicircular. On the 

 lower left-hand side of the specimen figured there is a tube 

 which I do not understand, but probably it is a zooecial tube 

 irregularly placed. Zooecial aperture about 0'07 millim. 

 in diameter. 



Loc. New Zealand {B.) ; Port Jackson {Haswell) ; Bondi 

 Bay, near Sjdney, New South Wales. 



89. Lichenopora Houldsworthii (Busk). 

 Discoporella Houldsworthii, Busk, Cat. Mar. Pol. pt. iii. p. 33, pi. xxx. 



Lichenopora Houldsworthii, Waters, Quart. Journ. Geol. Soc. vol. xliii. 

 p. 347. 



There is a specimen from Watson's Bay with the cancelli 

 about 0'07 milJim. and the zooecial apertures nearly as large. 

 In the interior of both zooecial tubes and cancelli there are 

 numerous radiating spines with a nodular termination, the 



