Abstract
The Arnett local fauna from Ellis County, Oklahoma (see Kitts, 1957) includes two remarkably well preserved and complete felid lower jaws. Investigation has revealed that these specimens are very similar to and probably conspecific with material from the Higgins local fauna which has been referred to Machairodus Kaup (see Hesse, 1940) and material from the Black Hawk Ranch local fauna which has been referred to Pseudaelurus Gervais (see Macdonald, 1948). A study of the Arnett, Black Hawk Ranch and Higgins specimens reveals that they are certainly not referable to Machairodus and that, although they bear a number of marked resemblances to the lower jaw of Pseudaelurus, their generic separation from this genus is almost certainly justified.

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