152 president's address — section c. 



Mr. Crick, of the British Museum, in a paper on "A Collection 

 of Jurassic Cephalopoda from Western Australia," records Ammonites 

 {Perisphinctes) Championensis from Cape Riche to the east of Albany, 

 and naturally claims a Jurassic Age for the beds. 



In 1898 I visited Cape Biche. The beds consist of sandy lime- 

 stones, which extend between Cape Riche and Warriup, and are fos- 

 siliferous. The Cape Riche beds have yielded : — In>pressions of a 

 Cycadaceous leaf (?) ; Hemiaster, sp. ; Pectunculus, near P. flabellatus, 

 Ten. Woods : internal casts of Cytherea, Area, Lima, Mactra, Amusium, 

 and Valuta, in addition to Venus, near V. roseotincta, Baird. 



The Warriup beds have yielded : — Cardiuni, sp. ; Cardium hemi- 

 cardium, Linn. ; Trochus personatus (?) Phil. ; and Area reticulata, 

 G. M. These strata would therefore seem to be either Recent or very 

 young Tertiary. Even assuming that the Cape Riche series turn 

 out on further investigation to be Secondary, I do not think the Jurassic 

 can put in any claim for recognition. I am, therefore, inclined to think 

 that Mr. Crick's ammonite recorded from Cape Riche has been wrongly 

 localised, and really came from Champion Bay. 



The Champion Bay Jurassic beds cover a fairly large area of 

 country to the south, in the neighborhood of the coastline ; they are 

 seen to rest with a violent unconformity on the Carboniferous rocks 

 of the Irwin River valley. They also probably extend northwards, 

 for in the deep bore near Carnarvon strata — high up in the Mesozoic 

 series — have been recognised between 1,200ft. and 1,500ft. 



The Champion Bay beds consist of oolitic limestones, clays, sand- 

 stones, grits, and conglomerates. Fossils are abundant, and they 

 include a considerable number of Cephalopoda : Belemnites, sp. 

 Nautilus perornatus, sp. nov ; Ammonites {Dorsetensia) Clarkei, sp. nov.; 

 Ammonites (Stephanoceras) Australe, sp. nov. ; Ammonites (Sphce- 

 roceras), Woodward, sp. nov. ; Ammonites (SphcEroreras) semiorna- 

 tus, sp. nov. ; Ammonites {Peris phinctes) Championensis, sp. nov. ; 

 Ammonites (Perisphinctes) rohinginosus, sp. nov. There have also 

 been obtained: — Trigonia Moorei, Lycett; Myacitus, Sandfordii, 

 Moore ; Luna, sp. ; Linva. allied to L. pectiniformis, Gold ; Cucullcea 

 semistriata, Moore ; Pleuromya ; Astarte Cliftoni, Moore ; Gresslya, sp. ; 

 Gryphcea, sp. ; Mytilus, allied to M. Gygerensis, D'Orb. ; Pecten fronta- 

 lis, Dumortier. 



No estimate can as yet be made of the thickness of these Jurassic 

 beds ; they have, however, been pierced by four bore holes in the Cham- 

 pion Bay district, the deepest being at Dongara. This bore was sunk 

 for the purpose of the delimitation of the seaward extension of the 

 Irwin River Coal Measures, which there are good grounds for believing 

 to lie beneath the Mesozoic beds. The bore attained a depth of 2,111ft., 

 when operations were stopped, owing to the capabilities of the boring 

 plant being exhausted, without the base of the Jurassic rocks having 

 been reached. There are thus over 2,000ft. of these beds in this 

 locality. 



The recognition by Mr. W. D. Campbell of the remnants of an 

 extensive dolomitic limestone formation at an altitude of about 900ft. 



