NOTES ON A COLLECTION OF TERTIARY LIMESTONES. 
Truncatulina variabilis, d’Orbigny. 
(Plate VII., Fig. 6a.) 
T. variabilis, d’Orbigny, 1826, Ann. Sci. Nat., Vol. VII., p. 279, 
No. 8 ; Brady, 1884, Rep. Chall., Vol. IX., p. 661, pi. xciii., figs. 6, 7. 
A good example of T. variabilis is seen in a thin section of the 
pink limestone from the Seal River. It is easily recognised by its 
thin test and numerous chambers arranged in a tortuous and broken- 
spiral fashion. 
From the Australian Tertiaries, Mr. Howchin obtained this 
species in the older beds of Muddy Creek. 
Truncatulina ungeriana, d’Orbigny sp. 
(Plate VI., Figs. 2a-c.) 
Rotalina ungeriana, d’Orbigny, 1846, Foram. Foss. Vien., p. 157, 
pi. viii., figs. 16-18. 
Truncatulina ungeriana, d’Orbigny sp., Brady, 1884, Rep. Chall., 
Vol. IX., p. 664, pi. xciv., figs. 9a-c. 
A small example with a very deep and conical inferior face was 
found in the washings of the polyzoal rock. 
Mr. Howchin recorded this form as occurring in the Lower and 
Upper Muddy Creek beds, at Mount G-ambier, the Bore on the 
Murray Flats, and the Kent Town Bore, Adelaide. 
ANTHOZOA. 
ALC YON ARIA. 
Mopsea hamiltoni, Thomson sp. 
(Plate VI., Figs. 3 a, b ; 4.) 
Isis hamiltoni, Thomson, 1908, Trans, and Proc. N.Z. Inst., 
Vol. XI., p. 99, pi. xiv., fig. 1. . . . , 
In the present series there are two calcareous joints of an 
alcyonarian which may be referred to the above species One of 
them is more or less cylindrical (subquadrate), and longitudma y 
grooved with comparatively coarse and deep furrows Ridges 
often once bifurcated and slightly twisted. A few impressed puncta 
visible along the surface of the ridges and sometimes m the furrows. 
A scar on the side of this specimen seems to indicate the position 
of a branchlet. End of axis dilated and meeting the mtemodal 
surface to form a tolerably sharp angle. Terminal face subcorneal, 
"ed° and subdivided into a series of primary septa, and by 
further division into as many again. These furrows are generally 
fo"u™ith those on the lateral surface. There is a smal 
conical papilla in the centre of the articular surface. Diameter of 
aXi The second specimen is much shorter, slightly stouter and with 
the iateml furrows crossed by little bars or dissepiments, giving 
the grooves a distinctly punctate appearance. 
7965.— E ^ 43 ^ 
