Figure 15. Histology underlying grossly smooth surface patterns. A in Growth and textural ageing in long bones of the American alligator Alligator mississippiensis (Crocodylia: Alligatoridae)

Figure 15. Histology underlying grossly smooth surface patterns. A, slight surface undulations (arrows) associated grossly with shallow dimples (FWC 40854, femur section b). B, smooth surface underlain by zone of lamellar bone (FWC 40583, humerus section c). C, smooth surface underlain by annulus. Arrows indicate annuli throughout cortex (FWC LGS8, tibia section d). Scale bars = 230 µm.