18 
Case 20. 
Cases 21 
22 . 
This case contains some striking forms of Ammonites 
(Boliteceras) and a Nautilus. The internal bones 
of Cuttle-fishes (Belemnites) are also exhibited, 
which are very like those found in similar beds in 
Europe. A remarkable replacement in precious 
opal of the tooth of a Cretaceous Mudfish, Meta- 
ceratodus, is seen here, and also the scaly armour 
of the Ganoid fish, Belonostomus. The phalangeal 
or toe-bone of an extinct marine reptile, Cimolio- 
saurus, makes a conspicuous object, as it, also, 
has been changed into precious opal. 
Fig. 19. An Ammonite — Boliteceras daintreei (Etheridge). 
Lower Cretaceous. Flinders River, Queensland. 
and These contain a unique series of Jurassic plants from 
Victoria, Queensland, and other parts of Australia. 
They comprise ferns, leaves of the Maiden- 
