PLATE 13. 
Fig. 1. 
Fig. 2. 
Fig. 3. 
Fig. 4. 
Fig. 5. 
Fig. G. 
Fig. 7. 
Fig. 8. 
Fig. 9. 
Fig. 10. 
Fig. 11. 
Fig. 12. 
Fig. 13. 
Fig. 14. 
Fig. 15. 
Fig. 1G. 
Fig. 17. 
Fig. 18. 
Fig. 19. 
Productus cora, D’Orbigny. Ventral valve, decorticated. Stairwell. 
Productus longispinus , .J. Sowerby ? Dorsal valve (after Etheridge, Quart. 
Journ Geol. Soo., xxviii., t. 18, f. 9). Don Eiver. 
Productus , sp. ind. Partially decorticated ventral valve, exhibiting large 
muscular impressions, &c. (to compare with P. hrachgthcerus, 
and P. subquadratus , t. 38, £. 7 and 8). H.S. Wales. 
Productus, sp. ind. Cast of a decorticated ventral valve, with prominent 
spine bases in the median sinus, after the type of P- 
praslongus, Davidson. Stanwell. 
Productus brachytlioorus , G. Sowerby ? Veutral valve, much decorticated 
and somewhat crushed, exhibiting decurrent spine-bases. 
Stanwell. 
Productus, sp. ind. Decorticated ventral valve, with a sharp umbo, and 
fine, distinct, string-like costae, after the type of P. striatus, 
Fischer. Burnett District. 
Chonetes, sp. ind. Dorsal valve, with exceedingly numerous bifurcating costae. 
(?=Figs. 8 and 11.) x 1|. 
Chonetes, sp. ind. Dorsal valve, much decorticated and highly punctate 
(?=Figs. 7 and 11). X 1|. Athelstane Eange. 
Chonetes cracowensis, Etheridge. Dorsal valve. Great Star liiver Beds. 
Chonetes (deltoid species). Ventral valve. X If. Great Star Eiver Beds. 
Chonetes, sp. ind. Dorsal valve, internal cast (?=Figs. 7 and 8). Stanwell. 
Strophalosia ClarJcci, Etheridge. Ventral valve, partly an internal cast, 
partly with the test preserved. Bowen Eiver Coal Field. 
Do. Dorsal valve of another specimen, with the test preserved (after 
Etheridge, Quart. Journ. Geol. Soc., xxviii., t. 17, f. 2 b). 
Bowen Eiver Coal Field. [A.D.] 
Do. Another specimen (after Etheridge, Quart. Journ. Geol. Soc., 
xxviii., t. 18, f. 4). iSogoa Eiver. [S.D.] 
Do. Interior of the dorsal valve, showing dental sockets, adductor, 
and reniform impressions, septum, &c. Bowen Eiver Coal 
Field. 
Do. Interior cast of the ventral valve, showing the impressions of 
the cardinal and adductor muscles, channels of spine-bases, 
septum, &o. Bowen Eiver Coal Field. 
Do. Internal cast of the ventral valve of another specimen, with 
the dental sockets, and adductor and cardinal muscular 
impressions visible. Bowen Eiver Coal Field. 
Strophalosia Gerardi, King ? Dorsal view, displaying concave dorsal valve, 
area, and umbo of ventral valve. Bowen Eiver Coal Field. 
Lingula myiiloides, .T, Sowerby (or L. ovata, Dana?) Ventral valve. x2. 
Cania District. 
