NOTES ON A COLLECTION OP TERTIARY LIMESTONES. 
P0LY20A Chilostomata. 
Selenaria marginata, T. Woods. 
(Plate VII., Fig. 3.) 
S. marginata, T. Woods, 1880, Trans. R. Soc., S.A., Vol. III., 
p. 9, pi. ii., figs. 9 a-d. 
The zoaria are abundant in the hard pink limestone. In thin 
sections of the rock they are cut in all possible directions, and show 
the characteristic form of the thyrostorne. Where the sections cut 
through the apex, there is usually seen an adventitious shell or 
detrital fragment immersed in the apical portion. The zooecial 
margins are rounded, and there are numerous vibracular cells inter- 
spaced at the angles of the zooecia, of about half their size, and with 
a cribriform wall. A section parallel with and close to the dorsal 
side shows the radial areolae to bo non-porous, as in MacGfillivray’s 
var. lucens * 
Selenaria concinna, T. Woods. 
(Plate VI., Fig. 7.) 
S. concinna, T. Woods, 1880, Trans. R. Soc., S.A., Vol. III., 
p. 10, pi. ii., figs, lla-e. 
Sections of the entire zoarium occur in the hard pink limestone. 
They show the characteristic shield-shaped outline of the zooecium, 
whilst the apical zooecia have in some cases the projecting tongue 
on the proximal border, which is feebly developed in this species 
and more strongly shown in the allied S. otwayensis, Maplestone.'f 
The elongate vibracularia cells can also be made out, more than 
one showing the opening with the serrate border typical of this species. 
I enison \\ oods recorded this form from the Kalimnan of 
Muddy (Jreek. It is also distributed in the lower beds, of 
Barwonian age, in Victoria (Maplcstone). 
Amphiblestrum (?) bursarium, MacGillivray. 
A. bursarium, MacGillivray, 1887, Trans, and Proc. R. Soc. 
Viet., Vol. XXI 11., p. 66, pi. ii., fig. 2. 
Idem, 1895, Trans. R. Soc., Viet., Vol. IV., p. 41, pi. v., fig. 22. 
Part of a large zoarium, about 20 mm. square, from which the 
front walls of nearly all the zooecia have been removed. Zooecia 
subquadrate to elongate, alternate ; more generally quadrate than 
in MacGilliv ray’s figured specimens. Zooecial margins thick, 
granular, or furrowed. 
Occurs in the polyzoal rock. 
JrAWSS vol< iv< * 1805> p - 48> * vii - * 11 <■«■* * ** - 
t Proe. R. Soo., Victoria, vol. xvi. (N.S.), pt. ii., 1904, p. 216, pi. xxv fig 8 
[46 | 
