400 NOTES ON THE CANIDH OF THE WHITE RIVER OLIGOCENE. 
although, like all other Canidw of the Lower Miocene period, the carnassial teeth are 
relatively smaller than in the recent types ” (’89, p. 929). 
The White River species of this genus are probably two in number. 
CYNODICTIS 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. Il, p. 124. Canis gregarius Cope, 
Ann. Rept. U.S. Geolog. Surv. Terrs., 1873, p. 506. Gralecynus gregarius Cope, 
Tertiary Vertebrata, 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 eyen 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 proportions 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 : 
CYNODICTIS LIPPINCOTTIANUS Cope. 
Canis lippincottianus Cope, Synopsis of Vertebrata Collected in Colorado ; Miscell. Publ. 
U.S. Geolog. Surv. Terrs., 1873, p. 9; Ann. Rept. U.S. Geolog. Surv. Terrs., 1873, 
p- 006. Galecynus lippincottianus Cope, Tert. Vert., p. 919. 
The status of this species is still a matter of some uncertainty ; Cope, who estab- 
lished it upon mandibular rami, describes it as haying “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 (No. 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, but 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 than in the White River beds; from the former horizon Cope has deter- 
mined C. gregarius, C. lemur, C. latidens and C. geismarianus. 
