22 
Cases 29 and 
30. 
Case 31. 
Carboniferous Sponge, Receptaculites, and 
a selection of the fishes from Mansfield, 
such as Gyracanthides (an early form of 
Shark), Ctenodus (a lung-fish), and Strepsodus 
(a predatory fish with comparatively large tearing 
teeth). 
These comprise a series of Devonian fossils, includ- 
ing ferns, corals, mollusca, and the ancient air- 
breathing fish, Phlyctaenaspis (“ Asterolepis ” of 
McCoy). 
Silurian Corals are well represented, chiefly from Lilydale 
and Yass. Here we see the mound-shaped 
Favosites, large forms of Cyathophyllum, and 
the interesting anchoring Coral, Rhizophyllum, 
Fig. 24. Gyracanthides. 
Outline restored by A. Smith Woodward. 
