Batesfovd Limestone. 283 



An Eocene and Miocene species in Europe. Howchin found it 

 in only the Kalimnan beds of Muddy Creek. As a living fora- 

 minifer it affects quite shallow water. 



Two specimens from the Filter Quarries ; one being a double 

 form, in plastogamic union. 



Discorhina dimidiata, Parker and Jones. 



D. dijiiidiata, Parker and Jones, 1862, in Carpenter, Parker 

 and Jones' Introd. Study Foram., p. 201, Fig. XXXIIB. 

 Parker and Jones, 4865, Phil. Trans., vol. CLV., 

 pp. 385, 422, pi. XIX., Figs. 9a-c. Chapman, 1907, Journ. 

 •Quekett Micr. Club, ser. 2, vol. X., p. 136, pi. X., Figs. 

 8a, h. 

 It is of nuich interest to record this living Australian species 



from our older tertiary strata. The specimens are quite typical. 



Rare in the rock at the Filter Quarries. 



Discorhina valvulata, d'Orbigny sp. 



Rosalina vdlvulata, dOrbigny, 1826, Ann. Sci. Nat., vol. TIL, 



p. 271, No. 4. Discorhina valvulata, d'Orb., Brady, 



1884. Rep. Chall., vol. IX., p. 644, pi. LXXXVIL, Figs. 

 5-7. 



As a living form this species is typical of the shallow waters 

 of "the Australian coast. The writer found it in shore sand 

 at Torquay. Howchin records it from Post-tertiary beds at Port 

 Adelaide. Moderately common in the limestone of the Filter 

 Quarries. 



Discorhina biconcava, Parker and Jones. 



D. hiconcava, Parker and Jones, 1865, Phil. Trans., vol. CLV., 

 p. 422, pi. XIa., Figs. lOa-c. Brady, 1884, Rep. Chall. 

 vol. IX., p. 653, pi. XCL, Figs. 2, 3. 



The test of one of the Filter Quarry specimens is slightly his- 

 pid. Another found here is of exceptionally large size. This 

 species is found still living on the Victorian coast. 



