PLATE 11. 
Pig. 1. 
Pig. 2. 
Fig. 3. 
Pig. 4. 
Pig. 5. 
Pig. 6. 
Pig. 7. 
Pig. S. 
Pig. 9. 
Pig. 10. 
Pig. 11. 
Pig. 12. 
Pig. 13. 
Pig. 14. 
Fig. 15. 
Pig. 1G. 
Pig. 17. 
Pig. 18. 
Pig. 19. 
Fig. 20. 
Pig. 21. 
Pig. 22. 
Fig. 23. 
Pig. 24. 
Pig. 25. 
Pig. 26. 
Pig. 27. 
Pig. 28. 
Pig. 29. 
Spirifera bicarinata, Eth. fil. Ventral valve. G-reat Star Elver Series. 
Do. Another specimen. Port Curtis District. 
Do. Portion of a ventral cast of a variety. Port Curtis District. 
Spirifera duodecimoostata, McCoy. Ventral valve. Cania. 
Spirifera, sp. ind. Impression of part of a large ventral valve, with 
numerous interpolated ribs. Stanwell. 
Martinia? produetoides, Eth. fil. Ventral valve, possessing incipient 
radiating ribs in the middle line. Cania. 
Do. Another specimen, with a smooth surface. 
Do. Dorsal (?) valve of young form, with area and fissure. 
Do. Another similar specimen.' 
Do. Exterior of a young individual, but with a sulcus instead of a fold. 
Do. Ventral valve of another example, with area, fissure, and internal 
radiating ribs. 
Martiniopsis ? subradiata, var. Morrisii , Eth. fil. Ventral valve of an 
abnormal variety. Cania. 
Do. Side view of the same specimen. 
Martiniopsis? subradiata , Gr. Sby., sp. Internal cast of the ventral valve. 
Stanwell. 
Atliyris Boysii, Leveille. Portion of an impression showing concentric 
imbrications, and the marginal radiating spines. (This is a 
very indifferent figure.) Stanwell. 
Atliyris Randsi, Eth. fil. Dorsal view, showing the high fold. X 1^. Port 
Curtis. 
Do. Side view of the united valves, x If. 
Do, Front view of the same, x If. 
Atliyris ambiyua, Sby. A much crushed example, which is in consequence 
made to look too angular. (A bad figure.) Port Curtis. 
Bhynchonella lilymerensis, Eth. fil. Dorsal view. Lilymere. 
Do. Ventral view of the same specimen. 
Do. Side view of the united valves. 
Bhynchonella pleurodon , Phillips ? Dorsal view, x 2. Cania. 
Betzia radialis, Phillips. Crushed example of the ventral (?) valve. Great 
Star fiiver Series. 
Do. Portion of the surface, enlarged to show the casts of the shell 
perforations. 
Orthis resupinata, Martin. Decorticated ventral valve. Stanwell. 
Orthis australis, McCoy? Internal cast of the ventral valve, with the 
muscular impression casts well marked. Great Star Eiver 
Series. 
Orthis resupinata, Martin. A small internal cast of the ventral valve 
referable to this species. Great Star Eiver Series. 
Orthis australis, McCoy ? A small example of the dorsal (?) valve. 
Stanwell. 
