Figure 2
From: The bone microstructure of polar “hypsilophodontid” dinosaurs from Victoria, Australia
Images of transverse sections from hypsilophodontid right femur NMV P177935. (a) Thin section slide designated AI, the first of three transverse thin sections made for the study by Chinsamy et al.4. Possibly a fragment from the medial side. The thin section was polished too thinly to detect the presence of CGMs. Plane polarized light. (b) Thin section slide designated AII, the second of three thin sections made for the study by Chinsamy et al.4. Possibly a fragment from the anterolateral side. The thin section was polished too thinly to detect the presence of CGMs. Plane polarized light. (c) Thin section slide designated AIII, the third of three thin sections made for the study by Chinsamy et al.4. The thin section was too opaque to detect the presence of CGMs. Plane polarized light. (d) Complete transverse section made for the study by Woodward et al.6. Blue letters reference the magnified regions shown in corresponding panels. Plane polarized light. (e) The lamellar endosteal layer (EL) completely encircles the medullary cavity and is frequently intersected by radiating channels. Plane polarized light. (f) Compact coarse cancellous bone is visible in the upper right of the panel, and three annuli are visible (arrows) within the cortex. Plane polarized light. (g) The third annulus (arrow) is visible within poorly organized parallel-fibred bone, and is followed by two LAGs (arrows) within the well-organised lamellar tissue of an external fundamental system (EFS). Circularly polarized light.
