PLATE II. 
Fig. 1. 
Fig. 2. 
Fig. 3. 
Fig. 4. 
Fig. 5. 
Fig. 6. 
Fig. 7. 
Fig. 8. 
Fig. J). 
Fig. 10. 
Fig. 11. 
Fig. 12. 
Fig. 13. 
Fig. 14. 
Fig. 15. 
Fig. 16. 
Maccoyella reflecta, Moore, pp. 
Left valve, exliibiting the fold-like posterior alation, costre, wide concentric lamin® of 
growth, and intermediate frills. 
Interior of Fig. 1, exhibiting the cardinal area supporting the transverse pyriform 
chondrophore, anterior scobinate lamella;, central shoe-horn-shaped socket, linear 
posterior area, and reniform adductor scar. 
Mount Stuart Run — Colin. Macleay Museum. 
Maccoyella Barklyi, Moore, sp. 
Eight valve, exterior, showing chondrophoral plug, byssal sinus, and I’emains of costae. 
Interior of Fig. 3, exhibiting chondrophoral button, byssal sinus, posterior pyriform 
chondrophore, ossiculum below the latter, adductor impression, and supplementary 
muscle-fibre pits. 
North of Milparinka. 
Eight valve, exterior, replaced by translucent opal. 
White Olijfs. 
Malletia elongata, Etheridge. 
Eight valve, side view, more or less exfoliated. 
Dorsal view of Fig. G. 
Dunlop Station — Colin. Macleay Museum. 
Internal cast, partially enclosed in matrix. 
Mount Stuart East Bloch. 
Pseudamaura variabilis, Moore, sp. 
Dorsal view of an opalised shell. 
Ventral view of the same specimen (Fig. 9). 
White Cliffs — Colin. Brown. 
Dorsal view of a smaller shell, replaced by common opal. 
Ventral view of the same shell (Fig. 11). 
White Cliffs— CoWn. Gipps. 
Pseudamaura reflecta, Moore, sp. 
Dorsal view of an opalised specimen. 
Ventral view of the same individual, showing a portion of the reflected inner lip. 
White Cliffs — Colin. Brown. 
Dorsal view of a somewhat distorted specimen. 
Ventral view of the same shell (Fig. 15). 
White Cliffs — Colin. Brown. 
