FIGURE 5. Mellopegma georginense Runnegar and Jell, 1976 from the middle Cambrian of Australia. 1, 2, CPC 40431; arrow in 1 shows location of 2. 3, CPC 40432. 4, CPC 40433. 5, 9, CPC 40434; arrow in 5 shows location of 9. 6, 8, CPC 40512; arrow in 6 shows location of 8. 7, CPC 40435. Arrow shows imprint of shell scar. 10, CPC 40436, juvenile shell. 11, CPC 40437, juvenile shell. 12, CPC 40438, juvenile shell. 13, CPC 40439. 14-17, CPC 40440; in 14 the barbed arrow shows location of 15, barb-less white arrow shows location of 17, and solid black arrow shows location of 17. In 16, the arrow shows location of tubercle at polygon boundary. 18-19, CPC 40441; arrow in 19 shows location of 18. 20, CPC 40442. 21-22, CPC 40443; arrow in 21 shows location of 22. Scale bars: 1, 6, 500 µm; 2, 9, 15, 50 µm; 3-4, 7, 10-14, 19-21, 200 µm; 5, 100 µm; 8, 16-17, 20 µm; 18, 50 µm; 22, 10 µm.