Tertiaky Deposits Near Norseman, Western Australia. 
99 
-have suggested that at the time of maximum submergence the surface of 
the shield might have stood about 1500 feet lower than noAV, i.e.j that 
the sea which covered the area with which this paper deals might have 
been about GOO feet deep. The sea Avas almost certainly shallower than 
this — 2 ^ossibly not more than about GO feet dee^) — Avhen the fossiliferous 
limestones were deposited. Perhaps soon afterwards the sea-floor emerged 
and the Post-Miocene period of denudation began. 
Miss CreS 2 :)in in the appendix suggests interesting correlations of the 
Norseman beds with the Balcombian deposits in Victoria and in South 
Australia. 
VI. APPENDIX. 
NOTES ON THE BRYOZOA EROM LIMESTONES AT LAKE COWAN AND 
NORSEMAN, WESTERN AUSTRALIA 
By 
Irene Crespin. 
(Commonwealth Palaeontologist.) 
The preservation of the Bryozoa in the limestones from the above 
localities is poor, the majority of the sjjecimens being very Avorn and 
encrusted. Consequently sjoeeiflc determination of forms is limited. 
The following species have been recognized: — 
i.L LIMESTONE CLIFF. OUTCROP A. PENINSULA 
(a) Cheilostomata. 
Macropora clarkei (T. \Yooc!s) 
C I’llaria depressa ( Maplestone ) 
CeUepora fos^ia (Haswell) 
Porina gracilis (iM. Edwards) 
Retepora sp. 
Schizellozoon permnnihim ( McO . ) 
(b) Cyclostoniata. 
Spiroporina verticiUata (Goldf.). 
Mecgnoec.ia prohoscidca (M. Eds.) 
Idmonea incur va (McG.) 
Idmonea sja. 
Tecticavea cf . schna pperensis { McG . ) 
Lichenopora radiata ( Audouin) 
2. CAMPBELL’S “OPALIZED SEA-BEACH" NORSEMAN 
(a) Cheilostomata. 
Macropora clarhei (T. Woods) 
Amphiblestrum sp. 
Hinclisina geminata (Waters) 
CeUepora fossa (Haswell) 
