PLATE 22. 
Pig. 1. Maccoyella Barlclii, Moore, sp. ? Eight valve with the umbo and anterior ear- 
corrugations of the left valve (after Moore, Quart. Journ. 
Oeol. Soc., xxvi., t. 11, f. 2). Wollumbilla. [W.B.C.] 
Pig. 2. Do. Left valve with posterior flattened ear, and ridges of the anterior 
ear well shown (after Moore, Quart. Journ. Oeol. Soc., 
xxvi., t. 11, f. 1). Wollumbilla. [W.B.C.] 
Pig. 3. Do. var. mariasburiensis, Eth. ill. Left valve of a well-marked variety 
with rugged radiating costse, the posterior spinose. Mary- 
borough. 
Pig. 4. Maccoyella Barklii, Moore, sp. Interior of a right valve, showing expanded 
posterior wing sub-central, and supplementary muscular 
scars, and deeply divided anterior lobe. Maryborough. 
Pig. 5. Do. A small individual, with the valves in apposition, the costa of the 
right valve but faintly preserved. Walsh Eiver. 
Pig. 6. Maccoyella umbonalis, Moore, sp. Left valve, showing the more or less 
equilateral form, gibbous umbonal region, and numerous 
equal radiating costas (after Moore, Quart. Journ. Oeol. Soc., 
xxvi., t. 12, f. 3). AVollumbilla. [W.B.C.] 
Pig. 7. Do. Eight valve (after Moore, Quart. Journ. Oeol. Soc., xxvi., t.12, f. 2). 
Wollumbilla. [W.B.C.] 
Pig 8. Maccoyella corbiensis, Moore, sp. Left valve (after Moore, Quart. Journ. Oeol. 
Soc., xxvi., t. 11, f. 7). Mount Corby. [W.B.C.] 
Pig. 9. Do. Cast taken from an impression corresponding generally with this 
species, but possessing intermediate costa;. Maryborough. 
Pig. 10. Maccoyella ? substriata, Moore, sp. Eight valve enlarged, showing the large 
posterior wing and intercostal ribs (after Moore, Quart. Journ . 
Geol. Soc., xxvi., t. 11, f. 0). Wollumbilla. [W.B.C.] 
