NOTES ON A COLLECTION OF TERTIARY LIMESTONES. 
POLYZOA—Chilostomata. 
SELENARIA MARGINATA, T. Woods. 
(Plate VII., Fig. 3.) 
S. marginata, T. Woods, 1880, Trans. R. Soc., 8.A., Vol. IIL, 
p- 9, pl. 11., figs. 9a-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 thyrostome. 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 theirsize, and with 
a cribriform wall. A section parallel with and close to the dorsal 
side shows the radial areole to be non-porous, as in MacGillivray’s 
var. lucens.* 
SELENARIA concrnnéA, T. Woods. 
(Plate VI., Fig. 7.) 
S. concinna, T. Woods, 1880, Trans. R. Soc., 8.A., Vol. IIL, 
p. 10, pl. 11, figs. 1la-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.T 
The elongate vibracularia cells can also be made out, more than 
one showing the opening with the serrate border typical of this species. 
Tenison Woods recorded this form from the Kalimnan of 
Muddy Creek. It is also distributed in the lower beds, of 
Barwonian age, in Victoria (Maplestone). 
AMPHIBLESTRUM (?) BURSARIUM, MacGillivray. 
A. bursarium, MacGillivray, 1887, Trans. and Proc. R. Soc., 
Vict., Vol. XXIII., p. 66, pl. 11., fig. 2. 
Idem, 1895, Trans. R. Soc., Vict., Vol. IV., p. 41, pl. 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 MacGillvray’s figured specimens. Zooecial margins thick, 
granular, or furrowed. 
Occurs in the polyzoal rock. 
* Trans. R. Soc., Victoria, vol. iv., 1895, p. 48, pl. vii., fig. 11 (mamed lucens in text and 
lucida in explanation to plate). 
7 Proc. R. Soc., Victoria, vol. xvi. (N.S.), pt. ii., 1904, p. 216, pl. xxv., fig. 8. 
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