FIGURE 8. Lower cheek teeth of H. niobrarensis from Valentine Railway Quarries. Teeth are arranged in order of increasing wear stage, from left right. Standard orientations as in Figure 2. Each lettered pair shows occlusal view (above) and buccal view (below) except in 8.9, with lingual view below. Scale bars equal 1 mm; bars for occlusal and side views next to first specimen in each row also indicate scale for other specimens in that row. All UNSM numbers. 8.1-8.2, p3s. 8.1, 122859. 8.2, 122838. 8.3-8.8, p4s. 8.3, 122878. 8.4, 122907. 8.5, 123300. 8.6, 122900. 8.7, 122886. 8.8, 122892. 8.9-8.12, m1s. 8.9, 122942. 8.10, 122941. 8.11, 122986. 8.12, 123162. 8.13-8.18, m2s. 8.13, 122989. 8.14, 122992. 8.15, 122987. 8.16, 122988. 8.17, 122991, 8.18, 123177.