BY W. S. DUN, W. H. RANDS, AND PROFESSOR DAVID. 309 



Plate xviii. 



Fig. l.—CoAcinodisciis sp. Lower Cretaceous (Boiling Downs) Formation; 



Maranoa Kiver, Queensland ( x 350). Photo by L. C. Green. 

 Fig. 2.— Diatom, genus (?). Lower Cretaceous (Rolling Downs) Formation; 



Maranoa River, Queensland ( x .350). Photo by L. C. Green. 

 Fig. 3. — Radiolarian shell consisting of three concentric shells, perhaps 



Astrophacus, from Lower Cretaceous (Rolling Downs) Formation; 



Maranoa River, Queensland ( x 350). Photo by L. C. Green. 



Plate xix. 



Fig. 1. — Diatom, genus (?). Similar to above ( x 350). 



Fig. 2. — Tintinnua sp., from Lower Cretaceous (Rolling Downs) Formation; 



Maranoa River, Queensland ( x 900). 

 Fig. 3. — Drawing of Radiolarian shell (PI. xviii., flg. 3), showing details of 



structure. 



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