FIGURE 7. Thin sections and unusual internal moulds of Mellopegma from the Gowers Formation, middle Cambrian, Australia. Specimens 1, 3, 4 on slide CPC 40451. Specimen 2 on slide CPC 40452. 1, 2, thin sections of Mellopegma schizocheras sp. nov. Arrows point to thin external phosphate coat covering calcite shell replacement, revealing thickness of original shell. 3, 4, thin sections of Mellopegma georginense Runnegar and Jell, 1976. 5-7, internal mould of Mellopegma sp., CPC 40453. 8-9, 13-14, internal mould of Mellopegma?, CPC 40454. 10-11, internal mould of Mellopegma schizocheras?, CPC 40455. 12, possible coprolite that contains a bradoriid shell. Scale bars: 1-4, 7, 9-11, 200 µm; 5-6, 8, 12, 100 µm; 13-14, 5 µm.