Victorian Fossils, Pt. V. 15 



dark line may indicate the former existence of an 

 organic membrane. [7515]. x 14. 

 Fig. 5. — R. australis, Mt. Wyatt. A wax impression from a 

 hollow cast, showing rhombic plates and attached 

 spicules. [7506]. x 2. 

 ,, 6. — R. australis, Mt. Wyatt. A wax impression from a 

 hollow cast, showing the intermediate spicular 

 mesh of the internal surface, with the ])arallel 

 series of spicules and their slender axial branches. 

 [7506]. X 3. 

 ,, 7. — A restoration of one-half of the cup of Receptaculites 

 australis, Salter, based on the Queensland speci- 

 mens. The sectional view does not show the 

 spicular layers immediately in contact with the 

 vertical pillars. About one-half natural size. 



