BRYOZOA FROM AUSTRALIA. 689 
14, DrasroporA SUBORBICULARIS, Hincks. 
Diastopora suborbicularis, Hincks, Brit. Mar. Polyz. p. 464, 
plerxvi. fig. 11. 
I am not yet quite sure as to what must be looked upon as specific 
characters in Diastopora, and therefore call this suborbicularis with 
some hesitation. 
The zoarium is growing on Microporella cellulosa, form Adeona, 
from Muddy Creek, and is about 5 millim. in diameter. 
The apertures of the zocecia are about 0:08 millim. in diameter, 
which is about the same as in Mr. Hincks’s specimen, and slightly 
smaller than in specimens from Naples, which I called D. flabellum. 
The zocecia are separated by distinct lines, but probably this depends 
upon the conditions of growth. The ocecia are about 0°5 miliim. in 
diameter, and are circular rather than oval, and I have not found 
any ocecial tube. The surface of the ocecia is punctured with very 
fine pores close together. The D. flabellum of the Mediterranean has 
a tangential inflation of considerable width, and the ocecial tube is 
directed inwards, namely, towards the centre of the zoarium. There 
is also a specimen from Mt. Gambier, but this is not so well pre- 
served. A specimen from Waurn Ponds has an ovicell similar to 
that of my Naples specimen. 
15. Drastopora patina, Lamk. 
From Mt. Gambier there is a fragment consisting of about half of 
a caliculate colony which must have been the same size as specimens 
in my collection from the coast of France and from Capri (dredged 
at about 200 metres). This is closely allied to Discosparsa lami- 
nosa, d’Orb., from the Cenomanian. 
Loc. Living: British, Northern, and French seas; the Adriatic 
and Capri. 
16. REricULIPora, sp. 
_ here is a compressed branch from Mt. Gambier, about 0°7 millim. 
wide, with series 0°5 millim. apart, and with 7 or 8 zowcia in a 
series, which does not seem to differ in any way from my Reticu- 
lipora dorsalis from Naples; but from the one fragment I am not 
prepared to say that they are identical. 
17. RETICcULIPORA TRANSENNATA, nov. sp. Pl. XXX. figs. 2, 3, 6, 7. 
Section also figured in “‘ Closure of the Cyclostomatous Bryozoa,” 
Journ. Linn. Soe. vol. xvii. pl. xvii. fig. 5. 
Zoarium reticulated, large. The specimen sent over from Aldinga 
must have been at least 6 inches in diameter. The fenestre of the 
reticulations are 2—4 millim. long, and average about # as broad; 
branches (laminz) much compressed, about 0-5 millim. in section, 
and about 2 millim. deep, covered transversely with subparallel rows 
of 8-12 slightly exserted tubular zocecia, 0:07-0:08 millim. diam., 
0:4 millim. apart. Besides the zocecial openings, there are smaller 
non-tubular ones ; sometimes these are below the zoccia, at others 
