BRYOZOA FROM AUSTRALIA. 695 
Loc. Living: British, Mediterranean, Holborn Islands, Queens- 
land (A. W.), Semaphore (Adelaide) (A. W.). Fossil: Pliocene, 
Bruccoli, Sicily ; Curdies Creek, Muddy Creek, Bairnsdale, Mt. Gam- 
bier, Napier (New Zealand). * 
29. LicHENOPORA ALDINGENSIS, NOV. sp. 
Zoarium depressed in the centre, with about 20 pzimary bi- 
triserial rays, with about 50 zocecia in each ray. Mouths of the 
zocecia about 0:12 millim. in diam., which is half the size of the 
openings of the cancelli. 
This is much larger than Discoporella californica, B., but is allied. 
30. LicHenopora cocHiorpEA, d’Orb. in Domopora-form. 
Domopora cochloidea, VOrb. Pal. Frang. p. 990, pl. 781. figs. 5-7. 
Defrancia cochlordea (?), Hag. Bry. Maastr. Kreide, p. 42, pl. iv. 
fig. 8. 
In a specimen from Mt. Gambier, one colony grows out of the 
top of another. Hach colony is considerably raised, but concave in 
the centre, about 2-4 millim. in diameter. In the young colonies 
there are 10 rays of zoecia, with large openings, and between these 
and round the border very small cancelli. The zoccial tubes are 
about 0°8 millim., and the cancelli 0°3 to 0:4 millim. in diameter. 
Loc. Fossil: Senonian of Sainte Colombe (Manche), Mt. Gambier. 
31, LicHENopoRA BoLETIFoRMIS, d’Orb. (non Rss.), in Vecticavea-form. 
PEO OOIe figs, 20=2i12 
Tecticavea boletiformis, Orb. Pal. Franc. p. 991, pl. 781. figs. 
8-12. 
There are two colonies of this species from Aldinga; one forms a 
globular mass, slightly hollow in the centre, of about 30 millim. in 
diameter ; the other is growing on a Chilostomatous Bryozoan, and 
forms a conical mass 14 millim. high. The fresh colonies commence 
by growing over the previous one in a tectiform manner, but after- 
wards they become confluent, forming continuous sheets over the 
whole previous growth. In the early stage, therefore, this entirely 
corresponds with the Belgian fossil. 
The rays are biserial, with openings but little larger than the 
interradial and central cancelli. The apertures vary from 0:09 millim, 
to 0°13 millim. 
Although this ultimately attains a form closely resembling Radio- 
pora, the structure is different; for here each colony spreads from its 
own calcareous basis, whereas in Radiopora the zocecial tubes of one 
layer are continued into the next. Reuss has named what appears, 
from the description and figure, a true Radiopora, R. boletiformis, 
which does not seem to be allied to our form. The mode of growth 
of the present species resembles that of Defrancia prolifera, Rss. 
F. Polyp. pl. vi. fig. 1. 
Loc. Senonian ; Cypli (Belgium); Aldinga. 
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