696 A. W. WATERS ON FOSSIL CYCLOSTOMATOUS 
32. LicHENOPORA VARIABILIs, d’Orb. 
Bimulticavea variabilis, V@Orb. Pal. France. p. 983, pl. 779. figs. 
9-13. 
A colony from Aldinga consists of a number of confluent zoaria, 
the raised part of which measures about 4 millim., the distance from 
the centre of each colony being about 5-6 millim., with six or eight 
multiserial rays. The central cancelli are but very slightly larger 
than the others. The width of the zocecia is about 0-1 millim. 
In the Australian fossil I am not able to make out that there are 
in any part two layers, as figured by d’Orbigny, but in a section 
which I cut I find in certain of the zocecial tubes, at a distance 
from the surface, several tabule occurring at comparatively short 
intervals. 
Loc. Cretaceous: Meudon (France); Aldinga. 
30. HETEROPORA. 
There are some small pieces of Heteropora from Curdies Creek 
which are too imperfect for determination. Heteropora pelliculata, 
W., occurs abundantly fossil at Napier, New Zealand. 
ADDENDUM. 
34. IpMONEA ALDINGENSIS, NOV. sp. 
The front of the zoarium is rounded, with the rows of connate 
zocecia regularly placed 0°35—0-4 millim. apart, with five zocecia to 
each lateral series. Zocecia not much exserted; aperture about 
0°13 millim. 
The appearance is much the same as that of Clavitubigera convexa, 
d’Orb. (Pal. Fr. pl. 746. f. 12-15), with the exception that the dorsal 
surface is concave; but this is probably not a character of much 
moment. 
Loe. Aldinga. — 
EXPLANATION OF PLATES XXX. & XXXI. 
Puate XXX. 
Fig. 1. Crisia unipora, @Orb., X25. 
. Reticulipora transennata, nov. sp., front surface, X12. 
. Ditto, natural size. 
, 5. Fascicularia conjwucia, nov. sp., in matrix, natural size. 
. Reticulipora transennata, nov. sp., dorsal surface, X12. 
. Ditto, frond, seen laterally. 
. Section of Hornera frondiculata, Lamx., from Naples, showing the large 
pores which are united to the interior by means of small ones, also 
showing the interzoccial pores, X29. 
9. Pavotubigera gambierensis, nov. sp., Mt. Gambier, X12. 
10. Idmonea bifrons, nov. sp., front, X12. 
11. Ditto, dorsal surface, x12. 
12. Idmonea Hochstetieriana, Stol., front, x12. 
13. Ditto, dorsal surface. 
OAT Od H> G9 bO 
