. Bulletin of the British Museum (Natural History), Geology. 294 MIOCENE CARNIVORA OF EAST AFRICA an earlier offshoot of the dogs than Amphicyon: the latter could be said to be more specialised in having molars more nearly square than triangular, a more elaborate internal cingulum on M 2 and a greater development of the paracone at the expense of the metacone. Hecubides macrodon sp. nov. (PL 5, fig. 2; Text-fig. 55) Diagnosis. Large sized Hecubides species; M1 about 25 mm. transversely and 20 mm. longitudinally; internal cingulum proportionately smaller and external cingulum thinner than in ty
. Bulletin of the British Museum (Natural History), Geology. 294 MIOCENE CARNIVORA OF EAST AFRICA an earlier offshoot of the dogs than Amphicyon: the latter could be said to be more specialised in having molars more nearly square than triangular, a more elaborate internal cingulum on M 2 and a greater development of the paracone at the expense of the metacone. Hecubides macrodon sp. nov. (PL 5, fig. 2; Text-fig. 55) Diagnosis. Large sized Hecubides species; M1 about 25 mm. transversely and 20 mm. longitudinally; internal cingulum proportionately smaller and external cingulum thinner than in type species. Holotype. Left M1. Locality. Site 31, Rusinga Island, Kavirondo Gulf, Kenya. Description. M1 is structurally similar to that of H. euryodon, but larger, with rounded and less pronounced features. The paracone is slightly wider than the metacone: the protocone forms a broad and shallow crescent and the internal cingulum, best developed posteriorly, is proportionately smaller than in : the external cingulum is very thin and forms only a skin on the lower edges of the paracone and Fig. 55. Hecubides macrodon sp. nov. Left M1; occlusal aspect. Holotype (), Rusinga Is. XP5. Remarks. Few deductions can be made from an isolated tooth, but its difference from H. euryodon in size and minor details of structure, seem sufficient to merit specific distinction. The remarks on the type species regarding the relationships to Amphicyon apply also to this species. A right P4 () from Rusinga is also referred to H. macrodon; the tooth is very broken and only the outer edge of the paracone and metastyle 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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