400 NOTES ON THE CANIIME OF THE WHITE RIVER OLIGOCENE. 



although, like all other Canidce of the Lower Miocene period, the caruassial teeth are 

 relatively smaller than in the recent types " ('85, p. 929). 



The White River species of this genus are probably two in number. 



Cynomctis gregarius Cope. 



Syn. Amphicyon gracilis Leidy (non Pomel), Proc. Acad. Nat. Sci. Phila., 1856, p. 90; 

 1857, p. 90 ; Ext. Mamm. Fauna Dak. and Nebr., -p. 36. Amphicyon angustidens 

 Marsh, Amer. Journ. Sci. and Arts, 3d Ser., Vol. II, p. 124. Canis gregarius Cope, 

 Ann. Rept. U. S. Geohg. Surv. Terrs., 1873, p. 506. Galecynus gregarius Cope, 

 Tertiary Vertebrala, p. 916. 



This is the species which has been described so minutely in the foregoing pages. It 

 is one of the commonest White River animals and is very much more frequently met 

 with than any of the contemporary carnivores. Despite this abundance of individuals, 

 well-preserved specimens are rare and even these consist mostly of skulls only. As will 

 be seen from the tables of measurements, the different specimens vary little in size or in 

 the jiroportious of the various parts of the skeleton. One apparent exception to this 

 statement may be found in the case of No. 11381, which is remarkable for the length of 

 its hind limb, but this probably belongs to the following species : 



Cykodictis lippincottianus Cope. 



Canis lippincottianus Cope, Synopsis of Vertebrata Collected in Colorado; Miscell. Publ. 

 U.S. Geohg. Surv. Terrs., 1*73, p. 9; Ann. Rept. U.S. Geolog. Sure Terrs., 1873, 

 p. 506. Galecynus lippincottianus Cope, Tert. Vert., p. 911). 



The status of this species is still a matter of some uncertainty; Cope, who estab- 

 lished it upon mandibular rami, describes it as having "dimensions half as large again as 

 in C. gregarius," and adds : " Unfortunately there is not enough material in my hands 

 to render it clear whether the specimens represent a distinct species or a large variety of 

 the C. gregarius " ('85, p. 920). 



Among the specimens described in the foregoing pages is one (Xo. 11381) in which 

 the limb bones decidedly exceed in length and thickness those of the other individuals, 

 while the cranium is but little larger. Probably this specimen should be referred to C. 

 lippincottianus, hut in the absence of teeth the reference can be only provisional. 



In the John Day formation Cynodictis is represented by more numerous and more 

 varied species thin in the White River beds ; from the former h jrizon Cope has deter- 

 mined C. grig triu.<. C. lemur, C. latidens and C. geismarianus. 



