dc:description"FIG. 2. — Stratigraphy of the Purisima Formation: A, Stratigraphic column of the San Gregorio section of the Purisima Formation (in meters), showing stratigraphic position of UCMP vertebrate localities, dated ash beds, diatom floras, and species of Carcharodon; thickness measurements start over above missing section in uppermost part due lack of overlapping strata; epoch and stage boundaries marked as \"?\" are estimated; modified from Boessenecker (2011a); Pliocene-Pleistocene boundary after Hilgen et al. (2012); B, photograph of 3-4 m thick ash within Purisima Formation at mouth of San Gregorio Creek correlated with 2.5 Ma Ishi Tuff (Powell et al.2007); C, trace fossils in pervasively bioturbated sandstone,Purisima Formation,mouth of San Gregorio Creek; D, swaley cross-stratified sandstone, mouth of San Gregorio Creek. Abbreviations: Qt, Pleistocene terrace deposits; Tp, Purisima Formation; C, claystone; St, siltstone; Ss, sandstone. Scale bars: A, 2 m; B, C, 10 cm.";
dc:description"FIG. 27. — UCMP partial right squamosal (UCMP 219479) of Herpetocetus sp.; A, ventral view; B, dorsal view; C, ventral view with right petrosal and posterior process (UCMP 219114) in articulation; D, lateral view (without petrosal). Scale bar: 3 cm.";
dc:description"FIG. 28. — Petrosals of Herpetocetus sp.; right petrosal with attached compound posterior process, UCMP 219114 in A, ventral view; B, dorsal view,and C, medial view;D, compound posterior process of UCMP 219114 in posterolateral view;left petrosal UCMP 219115 in E, ventral view, F, dorsal view, G, medial view, and H, posterior view. Scale bar: 3 cm.";
dc:description"FIG. 29. — Petrotympanic elements of Herpetocetus sp.; A, UCMP 219117, partial right tympanic bulla in medial view; B, UCMP 219117 in dorsal view; C, UCMP 219117 in ventral view; D, UCMP 219116, compound posterior process of left petrotympanic in anterior view; E, UCMP 219116, posterior process of left petrosal in posterior view; F, UCMP 219116, posterior process of left petrosal in posterolateral view. Scale bar: 3 cm.";
dc:description"FIG. 30. — Partial right mandible of Herpetocetus sp. (UCMP 219077); A, medial view; B, lateral view; C, dorsal view; D, interpretive line drawing in dorsal view with cross section outlines (lateral direction in cross-sections is to left side). Numbers adjacent to cross sections indicate distance from broken anterior surface (measured in centimeters). Scale bar: 10 cm.";
