. Bulletin of the British Museum (Natural History), Geology. HEADON BEDS OF ENGLAND 59 P2 is slightly larger than Pi and double-rooted. There are no antero-external and postero-extemal cingula; otherwise the tooth is structurally nearly identical to Pi. There is the suggestion of a slight antero-internal groove. P3 is identical to P2, except for a larger size and a slightly stronger cusp-like antero-internal cingulum. There is a trace of an antero-internal groove. P4 is structurally quite similar to P3 but much larger. The sharp anteriorly crested main cusp falls to a prominent low anterior cu
. Bulletin of the British Museum (Natural History), Geology. HEADON BEDS OF ENGLAND 59 P2 is slightly larger than Pi and double-rooted. There are no antero-external and postero-extemal cingula; otherwise the tooth is structurally nearly identical to Pi. There is the suggestion of a slight antero-internal groove. P3 is identical to P2, except for a larger size and a slightly stronger cusp-like antero-internal cingulum. There is a trace of an antero-internal groove. P4 is structurally quite similar to P3 but much larger. The sharp anteriorly crested main cusp falls to a prominent low anterior cusp; this latter cusp is larger than that of Opsiclaenodon and the tooth is generally more pointed. There are small antero-external and antero-internal cingula. The antero-posterior talonid crest ends posteriorly in a small cusp. There is a slight antero-internal groove. It is difficult to estimate reliably the relative sizes of Mi and M2 from the alveoli in the holotype of D. hopwoodi because of mandible damage. By comparison with the holotype of D. woodi (about the same size as D. hopwoodi) where M3 is smaller than. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)
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