Art. XIII. — On some Foraminifera and Ostracoda from 

 Jurassic (Loiver Oolite) Strata, near Geraldton, 

 Western Australia. 



By FREDERICK CHAPMAN, A.L.S., RR.M.S., 



National Musevun. 



(With Plates XXII., XXIII.). 



[Eead 13th August, 1903]. 



Introductory Remarks. 



During an inspection of a series of fossils collected in Western 

 Australia for the Hon. (then Mr.) A. C. Gregory, F.R.G.S., and 

 sent by Mr. R. Daintree, F.G.S., to Professor McCoy, at the 

 National Museum, Melbourne, I noticed that the calcareous and 

 sandy infilling of specimens of Cucullaea and Trigonia was so 

 friable and promising for microzoa, as to justify a careful search 

 through the material after it had been broken down and washed. 

 The result was very gratifying, as some entirely new Ostracoda 

 were found ; whilst the Foraminifera were represented by an 

 interesting series of twenty-three species, some of which are also 

 new, and those already known throw a certain light on the 

 affinity of these beds with others containing similar microzoic 

 faunas elsewhere. 



The only earlier record of Jurassic Foraminifera which I can 

 find is that of Cristellaria cultrata, Montfort sp., given by Charles 

 Moore^ in his list of West Australian fossils, but unaccompanied 

 by any reference as to its locality. The evidence of the context 

 in that paper respecting the localities of the mesozoic fossil 

 collections in Moore's hands, points in favour either of the 

 district of Shark's Bay or of Champion Bay. 



As regards later mesozoic microzoa, nine species of Foramini- 

 fera and an entomostracan have been recorded from Wollumbilla, 



1 Quart. Journ. Geol. Soc, vol. xxvi., 1870, p. 231. 



