17 
Teeth of the extinct Sperm-whales, Parasqualodon 
and Metasqualodon are also exhibited here, and 
also the tympanies ( “ ear-bones ”) of Whale-bone 
Whales (Fam. Balaenidat) 
Fig. 18. Model and Shell of the Extinct Cuttle-fish — 
Spirulirostra curia Tate. Of Miocene age. 
Bird Rock Cliffs, Torquay. 
Here is an interesting series of Cretaceous Mollusca, Case 19. 
including Inoceramus, whose prism-like shell- 
fragments form thick beds of limestone in the marl 
series of Queensland. The impressions of a fern, 
Microphyllopteris, in sandstone is worth 
noting ; also fossil Sponges (probably of the 
Lithistid type, Siphonia, which although origin- 
ally siliceous or flinty, have been changed into 
iron pyrites (marcasite, a rhombic form of FeS 2 )), 
but still showing the exact fig-like shape of the 
ancient sponge. 
13756 . — 5 
