FIGURE 12. Topotypic upper cheek teeth of H. fluviatilis from Kleinfelder Farm. Standard orientations as in Figure 2. Each lettered pair shows occlusal view (above) and anterior view (below) unless otherwise indicated. 'R' indicates line drawing is reversed. Scale bars (equal to 1 mm) for occlusal and side views next to 12.1 also indicate scale for all other specimens. 12.1, ROM 7386, P3. 12.2, UNSM 83031, P4. 12.3, ROM 7412, P4; lower drawing is posterior view. 12.4, ROM 52635, P4; lower drawing is posterior view. 12.5, ROM 7342, P4. 12.6, ROM 52637, M1. 12.7, ROM 7346, M2. 12.8, ROM 52636. 12.9, ROM 7353, M2.