A COLLECTION OF TERTIARY LIMESTONES. 
NOTES ON 
PLACUNANOMIA SELLA, Tate. 
(Plate VI, Fig. 10.) 
P. sella, Tate, 1886, Trans. R. Soc., §.A., Vol. VIII., p. 9, pl. v., 
figs. la-c. 
Remains of four valves of this species are found exposed on 
fractured surfaces of the polyzoal limestone. It is somewhat diffi- 
cult to separate the two forms P. zone, Gray, and P. sella, Tate. 
The latter, according to Professor Tate’s synopsis of characters, is 
distinguished by the fine radial threads, as compared with the coarse 
ornament of P. done, whilst in the latter the radii tend to become sub- 
spinose. It is just possible that one of our specimens may belong 
rather to P. cone, since it measures 46 mm. in height; that of Tate’s 
example of the same species being 47 mm. 
List or Kine Istanp FossiIzs, 
witH NOTES ON THEIR STRATI- 
GRAPHICAL DISTRIBUTION IN THE TERTIARIES OF SOUTHERN 
AUSTRALIA. 
Fossils. 
Palaeachlya tuberosa, sp. nov. 
Tnthothamnium, sp. 
Globigerina ef. bulloides, @ Orbigny 
Truncatulina lobatula, W. and J. sp. 
Truncatulina variabilis, VOrb. sp. 
Truncatulina ungeriana, V@Orb. sp. 
Tsis hamiltoni, Thomson 
Cidaris (Leiocidaris) ef. australiae, 
Dunean sp. 
Spines of echinoids, indet. 
Spirorbis sp. 
Heteropora pisiformis, MacGill. 
Selenaria marginata, T. Woods 
Selenaria concinna, T. Woods 
Amplublestrum  (?) —_ bursarium, 
MacGull. 
(?) Lepralia cf. crassatina, MacGill. 
Adeona sp. 
Magellania cf. divaricata, Tate sp. 
Pinna reticosa sp. nov. 
Vulsella laevigata, Tate .. 
Pecten aldingensis, Tate 
Pecten praecursor, Chapm. 
Tima bassi, T. Woods 
Placunanomia sella, Tate 
Remarks. 
Also found in the limestone of the Moorabool 
Valley, at Maude. 
Common in the polyzoal rock generally. 
Baleombian to Kalimnan. 
Distributed throughout the Tertiaries. 
Barwonian. 
Balcombian to Kalimnan. 
Previously recorded from Janjukian beds 
as Isis sp., but not specifically named. 
Chiefly Janjukian and Kalimnan ; also from 
the Gellibrand River (Baleombian). 
Only recorded locality, Spring Creek. 
Balcombian to Recent. 
Balcombian to Recent. 
Balcombian to Recent. 
Balcombian to Recent. 
Janjukian. 
Lower beds, Aldinga. 
Lower beds, Aldinga. 
Chiefly Janjukian. 
Barwonian. 
Barwonian. 
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