lvii. 



16. 



*Leda inconspicua, Rv. 



* 



. . — — — 



17. 



Limopsis Belcheri, Adams *f 



•t *t 



S. Australia. 



18. 



JLimopsis aurita, Sassi 



*t 



Europe. 



19. 



Pectunculus laticostatus, 









Quoy *f 



*t 



* N. Zealand. 



20. 



JTrigonia acuticostata, McCoy* t 



*± *j. 



E.Australia 



21. 



jCorbula sulcata *f 



*t 



*t W. Africa. 



22. 



Terebratella Cumingiana, 









Davidson 



.. *t 



* N. S. Wales 



23. 



*Sphenotrockus variolaris, 









Woods 



* ■ 



N. S. Wales. 



24. 



Flabellum candeamum, Ed. 









and H. 



*t 



China. 



Other fossils have been referred to living species — to Trivia 

 Europcea, Leiostraca sicbulata, Lima subauriculata, Liotia lamel- 

 losa, Woods, &c, but competent authorities have not confirmed 

 these identifications. On the other hand, the Geelong coral, 

 Deltocyaflms italicus, Ed. & H., better known from the Italian 

 Miocenes, is considered by Count Pourtales and Sir "Wyville 

 Thomson to be specifically distinct from its living analogue 

 inhabiting the deep waters off the coast of Florida — an opposite 

 opinion to that held by Professor Duncan. Flabellum dis- 

 tinctum, Ed. & H., a living coral in the Chinese seas, is fossil 

 in the Victorian and South Australian Tertiaries older than the 

 Muddy Creek beds. 



If, then, we relegate the youngest member of our older 

 Tertiaries to the Miocene period, where are we to place the 

 older ones, particularly the inferior beds of the Aldinga series ? 

 The Lower Aldinga series contains not only a large number of 

 restricted species, but a small modicum of recent forms. Thus 

 of 116 known forms 34 pass up into the Upper Murravian and 

 its contemporaneous deposits ; whilst the number of recent 

 species is not more than four. A summary of the determina- 

 tions upon which the above figures are based is set forth in the 

 following: table : — 



Classes. 



No. Species in L. Aldinga 

 Series. 



No. Species common to 

 L. Aldinga Series and 

 the Upper Murravian 

 and Muddy Creek 

 Beds. 





3 



40 

 23 

 18 

 21 

 11 



2 



15 

 9 

 6 

 1 

 1 

















116 



34 



