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Updated: May 25, 2025
In the remarkable memoir on the phosphorites of Quercy, to which I have referred, M. Filhol describes no fewer than seventeen varieties of the genus Cynodictis, which fill up all the interval between the viverine animals and the bear-like dog Amphicyon; nor do I know any solid ground of objection to the supposition that, in this Cynodictis-Amphicyon group, we have the stock whence all the Viveridae, Felidae, Hyaenidae, Canidae, and perhaps the Procyonidae and Ursidae, of the present fauna have been evolved.
Leidy, Marsh, and Cope, on the fossils of the Western Territories of America, have appeared almost wholly since 1870, those of M. Filhol on the phosphorites of Quercy in 1878.
On the contrary, there is a great deal to be said in favour. In the course of summing up his results, M. Filhol observes: "During the epoch of the phosphorites, great changes took place in animal forms, and almost the same types as those which now exist became defined from one another.
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