BRYOZOA FROM AUSTRALIA, 691 
there are 24in 20 millim. The zocecial apertures are not continuous 
along the ray, but, instead, the ray becomes elevated at intervals, 
forming elongate fasciculi, with their openings directed upwards. 
These interruptions take place with considerable regularity, so that 
the fasciculi of neighbouring rays rise up at equal distance from the 
centre of the zoarium, which may be a constant character, or it may 
merely arise from the growth at the circumference being arrested 
and then recommencing simultaneously at all points. The position 
of the zocecia is marked by faint lines on the flat surface of the ray. 
It will be seen that the structure of this species closely resembles 
that of Pavotubigera flabellata, @Orb. Pal. Fr. p. 767, pl. 752. 
figs. 4-8. 
20. PavoruBIGERA FLABELLATA, d’Orb. 
Pavotubigera flabellata, dOrb. Pal. Franc. p. 767, pl. 752. 
figs. 4-8. 
? Semitubigera lamellosa, d’Orb. loc. cit. p. 749, pl. 750. figs. 16-18. 
This does not seem to differ from the Meudon specimen, except in 
there being two or three confluent colonies, and perhaps on that 
account it might be called var. extensa. 
The mode of growth of this species is very similar to that of 
Tubulipora; but in that genus the zocecia are freer, and the rays are 
not multiserial. 
One of the colonies is much more symmetrical than the others, and 
_ therefore approaches nearly to the figure of Semtubigera lamellosa, 
d’Orb. Zocecia 0-1 millim. diam. 
Loc. Cretaceous: Meudon; Aldinga. 
21. PavoruBigERA prmipiaTa, Rss. Pl. XXXI, fig. 25, 
Defrancia dimichata, Reuss, Foss. Polyp. d. Wien. Tert. p. 39, 
plc. nz. 6. 
The specimen from Mt. Gambier is but badly preserved and in- 
complete, and it is therefore impossible to speak with certainty as 
to the structure, but in the fragment the zocecia are bi-multiserial 
in fanlike rays, with a large inflation about the width of two rays, 
forming the ovicell. 
IT do not think the Tubulipora dimidiata, Manzoni, is the same 
as the Defrancia dimidiata of Reuss, though perhaps 7. pluma, 
pl. xvii. fig. 68 (only), Manz. Bri. Mioc. Austr. ed Ungh., may be. 
No undoubted recent Tubulpora has biserial rays, and therefore at 
first it seemed advisable to separate it from that genus on this 
account ; but the examination of a fossil from Napier, New Zealand, 
which is closely allied to Multifascigera campichiana, dOrb., shows 
that this is not a sufficient reason. This New-Zealand fossil, and 
also a recent specimen of the same, resemble an adnate Idmonea, 
with outlying rows of zocecia beyond the main ones, and in some 
the rows are ali bi-multiserial, and this was at first taken to be a 
marked character of the species; but in one large growth the rows 
are nearly always uniserial, though here some few colonies and parts 
