PLATE 39. 
Pig. 1. Burrow, with its infilling passing obliquely across the stratification. Rock- 
hampton District ( See PL 8, fig. 4, PI. 44, figs. 15-8). [DeV.] 
Eig. 2. Spirifera StoJcesii, G. B. Sowerby. Internal cast of the dorsal valve. Mount 
Britton Gold Field. 
Fig. 3. Do. Internal cast of the ventral valve of the same specimen. 
Fig. 4. Do. Side view, showing, the cast of the united valves. 
Fig. 5. Martinia (vel. Martiniopsis ?) Darwinii, Morris. Internal cast of the dorsal 
valve, taken from two specimens, to show the high sharp 
fold, grooved but undivided, and 2-3 costas on each side. 
Mount Britton Gold Field. 
Fig. 6. Do. Interna] cast of the ventral valve. 
Fig. 7. Do. Side view of the cast of the united valves of another example, to 
show the horizontal or depressed umbo of the ventral valve. 
- Mount Britton Gold Field. 
(A* icles-crtBccl JBcvcU «« 
Fig. 8. De. Decorticated right valve. Rockhampton District. 
Fig. 9. Nautilus ammonitiformis, Eth. fil. The inner whorls ( See PI. 41, fig. 9). 
Rockhampton District. [De V.] 
Fig. 10. Ortlwceras, sp. ind. Cast of five chambers. Mount Britton Gold Field. 
Fig. 11. Beltodus ? australis, Eth. fil, Rockhampton District. [De V.] 
