Mr. A. W. Waters on Australian Bryozoa. 21 
double as wide and arise from a calcareous crust; this, how- 
ever, is at first formed by a growth similar to the creeping 
branches of S. incrassata, and subsequently spreads out. 
This would be Filifascigera of d’Orbigny (Pal. Fr. p. 684), 
and I have a recent specimen from New Zealand which | 
cannot distinguish from /. dichotoma, @Orb. In it the 
bundles consist usually of four zocecia and the basal portion 
is punctate without zocecia. In such cases we must look upon 
the names given as registering the occurrence rather than 
expressing any opinion on the classification; and the same 
would apply to other Cyclostomata. 
Loc. Britain; Green Point, Port Jackson. 
Diastopora latomarginata, d’Orb. 
Diastopora latomarginata, VOrb. Pal. Frang. p. 827, pl. 758 
12; Waters, Ann. & Mag. Nat. Hist. ser. 5, vol. ili. p. 272 
fig. 12, which see for synonyms. 
re concinna, MacG. Trans. Roy. Soc. Vict. vol. xxi. p. 94, pl.i. 
g. 10. 
The zocecial tube of the Green Point specimens is a trifle 
smaller than that of my Naples specimens, measuring only 
about 0:06-0:07 millim., whereas those from Naples are about 
0:08 millim. In both cases the ovicells are inflations trans- 
verse to the rows of the zocecia, with the ovicellular duct 
directed towards the centre of the colony. 
Diastopora is not at all uncommon in the southern hemi- 
sphere, and it is therefore surprising to find that the author of 
the article on distribution in the ‘ Encyclopedia Britannica’ 
speaks of Diastopora as mostly northern. 
Loc. Living: Arctic Seas ; Mediterranean; Victoria ; Green 
Point, Port Jackson. Fossil: Pliocene of Sicily and Italy. 
s. 10- 
0”: 
5 . 
]. xxiv. 
. fi 
»P 
Idmonea serpens, Linn. 
Loc. Living: European Seas ; New Zealand; Green Point, 
Port Jackson. Fossil: Pliocene of Europe ; various localities 
in New Zealand. 
Lichenopora californica, Busk. 
Unicavea californica, d’Orb. Pal. Franc. p. 972. 
Discoporella californica, Busk, Cat. Mar. Polyzoa, pt. ili. p. 32, pl. xxx. 
fig. 5. 
Lichenopora californica, Waters, Journ. Linn, Soc., Zool. vol. xx. p. 282. 
pl. xv. fig. 1. 
There are several small specimens from Green Point without 
ovicells; but from the other characters they seem to be Z. 
californica. 
Loc. California; Victoria; Green Point, Port Jackson. 
