196 Proceedings of the Royal Society of Victoria. 



England/ which is also comparatively thin and compressed ; C. 

 opercula differs, however, from the above form in the relative 

 paucity of the chambers, and the more circular form of the test. 



Occurrence. — Somewhat frequent; Jurassic, Greenough River 

 district. West Australia. [2139-41]. 



Genus Flabellina D'Orbigny. 

 Flabellina dilatata, Wisniowski. PI. XXIL, Fig. 18). 



Flabellina dilatata., Wisniowski, 1890, Pamietnik wydz 

 matem. — przyrodn. Akad. Uniiejetn. w. Krakowie, vol. xvii., 

 p. 50, pi. X. (iii..), 21. 



Remarks. — This species reminds one of the F. rugosa," from the 

 Chalk of France, England and Bohemia, but it has the sutures 

 practically flush with the surface of the test, whereas in F. rugosa 

 they are salient. 



Terquem's F. semi-involuta^ is a similar form of shell, but it is 

 not so roundly ovate, and the chevron-shaped segments of the 

 later portion tend to overlap one another on the periphery. This 

 species came from the Jurassic (fuller's earth) series of Warsaw, 

 Poland. F. dilatata was obtained from the " ornatus " beds of 

 Poland. 



Occtirrence. — One specimen; Jurassic, Greenough River district, 

 W^est Australia. [2142]. 



Sub-f am ily Polynwrphininae. 



Genus Polyniorphina, D'Orbigny. 



Polymorphina burdigalensis, D'Orbigny. (PI. XXIL, 

 Fig. 19). 



Polymorphina burdigaletisis, D'Orbigny, 1826. Ann. Sci. Nat., 

 vol. vii., p. 265, No. 2 ; Modele No. 29. 



P. burdigaletisis, D'Orbigny, Brady, Parker, and Jones, 1870. 

 Trans. Linn. Soc. Lond., vol. xxvii., p. 224, pi. xxxix., figs. 9a, b. 



Remarks. — This species is distinguished by its compressed 

 form, which, on one side at least, is decidedly concave ; in this 



1 Journ. Northamptonshire Nat. Hist. Soc, vol. vii., 1892, p. 71, pi. ii., figs. 23, 24. 



2 Mdm. Soc. G6ol. France, 1840, s^r. 1 vol. iv., p. 23, pi. ii., figs. 4, 5 and 7. 



3 Mid., 1886, ser. 3, vol. iv., Mem. ii., p. 45, pi. iv., figs. 40-44. 



