Foraminifera and Ostracoda. 197 



latter respect it is separable from P. compressa, D'Orbigny. 

 The chambers are somewhat regularly alternate. D'Orbigny's 

 specimen came most probably from the middle tertiary near 

 Bordeaux. It is already known as a Jurassic species, having 

 been recorded from the English Lias by Tate and Blake. 



Ocairrence. — One specimen ; Jurassic, Greenough River dis- 

 trict, West Australia. [2143]. 



Polymopphina gutta, D'Orbigny. (PL XXII., Fig. 20). 



Polymorphina {PyniHua) gutta, D'Orbigny, 1826. Ann. Sci. 

 Nat., vol. vii., p. 267, No. 28, pi. xii., figs. 5, 6 ; Modele No. 30. 



P. gutta, D'Orbigny, Jones, Parker, and Brady, 1866. Monogr. 

 Crag. Foram., pi. 1, figs. 46, 47. 



P. gutta, D'Orbigny, Chapman, 1894. Quart. Journ. Geol. 

 Soc, vol. ]., p. 715. 



Id., 1896. Journ. Koy. IVIicr. Soc, p. 10, pi. ii., fig. 7. 



Remarks. — This is a well-known neocomian and gault species, 

 and it has also occurred in various tertiary strata. 



Occurrence. — -One specimen; Jurassic, Greenough River dis- 

 trict, West Australia. [2144.] 



Polymorphina compressa, D'Orbigny. (PL XXII., Figs. 



21, 22). 



Polyiiu)rphina compressa, D'Orbigny, 1846. Foram. Foss. 

 Vienne, p. 233, pi. xii., figs. 32-4. 



Remarks. — The Australian specimens are not quite typical, 

 since they are much broader than D'Orbigny's examples, and are 

 sub-rhombic in outline ; but the form is a very variable one, 

 and it is perhaps better to refer it to this species rather than to 

 regard it as a distinct form. In the prominence of the primordial 

 chamber in at least one of our specimens it resembles P. buccu- 

 lenta, Berthelin,' from the Gault of France ; it also shows a 

 paucity of chambers and a similar arrangement as in that species, 

 but the .segments are not quite so strongly inflated. 



P. compressa is well distributed throughout tlie fossiliferous 

 deposits commencing with the lias, and it is interesting to note 

 that Parker and Jones record it from the oolite series of England. 



1 ilem. Soc. Geol. France, ser. 3, vol. 1, 1880, p. 58, pi. iv. (xxvii.), figs. lGa-17i. 



