part of the Valentine
formation and the younger lower part of the Ash Hollow
formation are exposed in Williams Canyon; which one of these
formations yielded the holotype of _C. crucidens_ is unknown.

On the basis of the correlation chart (Pl. 1 in Nomenclature
and Correlation of the North American Continental Tertiary.
Bull. Geol. Soc. Amer., 52(pt. 1):1-48, 1941) by H. E. Wood
2nd _et al._, _C. fortidens_ and _C. crucidens_ are
equivalent in age or _C. fortidens_ is the younger.

The rounded summits of the principal cusps of the teeth of
_C. fortidens_ suggests that it was mainly frugivorous
instead of carnivorous--more frugivorous by far than the
living gray fox, _Urocyon cinereoargenteus_, that is known to
eat substantial amounts of fruits and berries. Indeed, no
other canid that we know of has teeth so much adapted to a
frugivorous diet as are those of _C. fortidens_. Its degree
of adaptation to a frugivorous diet is more than in the
procyonid genus _Nasua_ but less than in the procyonid genus
_Bassaricyon_.

_Measurements_ (of crowns) of _C. fortidens_.--P3-M1, length,
25.8 (millimeters); P4-M1, 18.9; P3, length, 6.2; P3,
breadth, 2.8; P4, length of outer border, 9.3; P4, breadth,
7.05; M1, length, 9.7; M1, breadth, 9.3; m2, length, 10.3;
m2, breadth, 6.6; depth of mandible at posterior end of m2,
17; thickness of mandible, 7.1.

_Transmitted February 21, 1962._

29-2890

End of the Project Gutenberg EBook of A New Doglike Carnivore, Genus
Cynarctus, From the Clarendonian, Pliocene, of Texas, by E. Raymond Hall and Walter W. Dalquest

*** END OF THIS PROJECT GUTENBERG EBOOK A NEW DOGLIKE CARNIVORE ***

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