PLATE 21. 
Eig. 1. 
Fig. 2. 
Fig. 3. 
Fig. 4. 
Fig. 4a. 
Fig. 5. 
Fig. G. 
Fig. 7. 
Fig. 8. 
Fig. 9. 
Fig. 10. 
Fig. 11. 
Fig. 12. 
Fig. 13. 
Fig. 14. 
big. 15. 
Fig. 16. 
Fig. 17. 
Fig. 18. 
Fig. 19. 
Fig. 20. 
Fig. 21. 
Fig. 22. 
Ostrea vesiculosa , J. Sowerby. Attached valve with lobe undeveloped. 
Chollarton. 
Do. Attached valve with a concentrically furrowed surface, and with 
remains of a lateral lobe. Chollarton. 
Do. Interior of Fig. 2, showing the cartilage furrows, &e. Chollarton. 
Amusiwn, sp. ind. (comp. A. sulcatellum, Stoliczka). Small portion of one 
valve with the ears preserved, but the general surface rather 
decorticated. Eockwood. 
Do. Surface enlarged. 
Pecten, sp. ind. {? P. socialis, Moore, or P. psila, Ten. Woods). A small 
valve seen from the inside, x 2. Mitchell bore. 
Pecten socialis , Moore. Valve devoid of oruament (after Moore, Quart. 
Journ. Geol. Soc., xxvi., 1. 11. f. 9). Wollumbilla. [W.B.C.] 
Do. Valve with square ears aud an ornament of divaricating lines, seen 
from the inside. Eockwood. 
Pecten cequilineaius , Moore ? Fragment of a valve seen from the interior 
with the external reticulate structure visible through the 
thin shell. Aramac. 
Pecten socialis, Moore. Valve with the same general appearance as Fig. 7 and 
divaricating lines, but with a larger ear. x If. Aramac. 
Pecten ceqinlineatus, Moore. Valve seen from the exterior, showing surface 
cancellation, but ears not perfect (after Moore, Quart. Journ. 
Geol. Soc., xxvi., t. 11, f. 11). Wollumbilla. [W.B.C.] 
Pecten, sp. ind. An ill-preserved specimen seen from the inside, thin- 
shelled and highly cancellated. Possibly allied to Fig. 12. 
Isis Eiver. 
Pecten braamburiensis, Moore (after Moore, Quart. Journ. Geol. Soc., xxvi., 
t. 11, f. 5). Wollumbilla. [W.B.C.] 
Lima? Panclsi, Eth. fil. A decorticated imperfect valve. Maryborough. 
Undetermined Bivalve, x If. Coreena Woolshed. 
Do. Two valves displaced, probably of the same species. X If. Aramac. 
Do. Eesembling genus Meleagrinclla, Whitfield. X If. Aramac. 
Inoceramus Cripsi, Mantell? Portion of a valve with concentric corrugations. 
Aramac W ell. 
Do. Another specimen partially decorticated and worn. 
Inoceramus, sp. ind. (? Young of I. pernoides , Etheridge.) Evora. 
Pecten ? Moorei, Eth. fil. Portion of a valve, probably a Maccoyella 
(P. Jimhriatus, Moore, Quart. Journ. Geol. Soc., xxvi., 1. 11, 
f. 8). Wollumbilla. [W.B.C.] 
Trigonia, sp. ind. Interior of a partially preserved valve. Blackall. 
Natica Jackii, Eth. fil. Julia Creek. 
