FIGURE 22 in A redescription of the three longest-known species of the acanthodian Cheiracanthus from the Middle Devonian of Scotland

FIGURE 22. Cheiracanthus grandispinus comparison of scale structure in different sized fish. 1, NMS G.2019.9.5.2, from Achanarras, small fish c. 10 cm long, vertical transverse section through scale anterior. 2, NMS G.2019.9.6.1, from Achanarras, medium sized fish less than 30 cm long, vertical transverse section through scale anterior. 3, NMS G.2019.9.8.12, from Jessie Port, medium sized fish, vertical transverse section through scale anterior. 4, NMS G.2019.9.9.14, from Achanarras, fish 30 cm or longer, vertical transverse section through scale anterior. 5, NMS G.2019.9.9.7, from Achanarras, fish 30 cm or longer, vertical longitudinal section. NMS G.2019.9.35.4, medium sized incomplete fish, vertical section of scale showing Sharpey's fibre bundles through base. Scale bars equal 0.1 mm.