388 DEVONIAN FORAMINIFERA, TAMWORTH DISTRICT, 



Saccamndna, but it never has the orifice so strongly protuberant. 

 Psammosphcei'a, as a genus, has not been found in fossil deposits 

 older than the Jurassic, from which system Dr. Haeusler* has 

 recorded the living species P. fusca Schulze. Tlie present 

 species is less than half the size of the Jurassic and recent forms. 

 P. nemiiighensis is by far the commonest foraminifer in the 

 Nemingha limestone, representing about 90 per cent, of the 

 entire foraminiferal remains 



Fam. TEXTULARTID^. 



Genus V a l v u l i n a d'Orbigny. 



Valvulina PLicATA, Brady. (Plate xxxix., figs. 3, 4). 



Vaivnlina plicata Brady, 1873, Mem. Geol. 8urv. Scotland, 

 Expl. Sheet 23, pp. 06, 95, etc.: Idem, Pal. 8oc. Mon., Vol. xxx., 

 1876, p.88, PL iv., figs.lO, 11. Chapman, 1907, "Notes on 

 Fossils from the Collie Coal-field," Bull. Geol. Surv. W. Austr., 

 No.27, p.l6, PI. ii., figs.lOa-c. 



Observations. — Several specimens occur in the microscope- 

 slides, which compare closely with Brady's species from the 

 Lower and Upper Carboniferous Limestone of England and 

 Scotland, as well as in the Fusulitta-heds (Carboniferous) of Iowa, 

 U.S.A. The writer has described a diminutive specimen of the 

 above species from the Carbopermian Sandstone associated with 

 Glossopteris leaves from Collie, W. Australia. 



An example occurs in one of the slides, which indicates a 

 plastogamic union of two individuals, as frequently seen in Bis- 

 corbina, Vaginulina, and other genera. 



Valvulina bulloides Brady. (Plate xxxix., figs.5, 6, 7). 



Vaivnlina bulloides Brady, 1876, Pal. Soc. Mon., Vol. xxx , 

 p.89, PL iv., figs.12-15. Chapman and Howchin, 1905, "Mon. 

 Foram. Peimo-Carboniferous Limestones of N. S. Wales," Mem. 

 Geol. Surv. N. S. Wales, Pal., No.14, p.l3, PL i., tigs.9a-c. 



Observations. —This species closely resembles a high and tumid 

 Globigerina, but is easily distinguished by the open umbilical 

 cavity on the lower surface, and the valvuline aperture. 



* Quart. Journ. Geol Soc, Vol. xxxix., 1883, p.26, PI. ii., fig.l. 



