_Remarks._--The lower jaw and its second molar seem to be from an individual significantly larger than the holotype. Possibly the lower jaw and upper jaw are from two species but the lower jaw probably is from a male and the upper jaw from a female of the same species. Reasons for regarding _Cynarctus_ as belonging to the family Canidae instead of to the family Procyonidae have been stated recently in detail by E. C. Galbreath (Remarks on _Cynarctoides acridens_ from the Miocene of Colorado. Trans. Kansas Acad. Sci., 59(3):373-378, 1 fig., October 31, 1956) and need not be repeated here. Although some uncertainty remains as to the familial position of _Cynarctus_, we favor Galbreath's view that the genus belongs in the family Canidae. The holotype of _Cynarctus crucidens_ is from Williams Canyon, Brown County, Nebraska. According to C. B. Schultz (_in litt._, December 6, 1961), Williams Canyon is a tributary of Plumb Creek; the upper 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