NOTES ON THE CANIDH® OF THE WHITE RIVER OLIGOCENE. 367 
Daphenus it is still distinctly visible, though very small. The proto- and metaconids 
are of equal size and placed on nearly the same transverse line; these cusps are higher, 
more sharply pointed and more slender than in the recent Canidw. The talon, which is 
somewhat lower than the anterior half of the tooth, retains a distinctly basin-like form. 
In the European species we find a more primitive character of m 5 in the retention of the 
paraconid. The third molar is yery small ; it has an oval, roughened crown and is car- 
ried upon a single fang. As Cope has pointed out, this tooth is usually missing in the 
fossils, and occasionally a specimen is found which has not even an alveolus for it. 
The dentition of Cynodictis gregarius is, on the whole, a little more modernized and 
advanced than that of the European representatives of the genus. This adyance is shown 
in the reduction of the inner cusp of the upper sectorial ; in the somewhat more quad- 
rate outline of m 1; in the less elevated shearing blade and more posterior position of 
the metaconid on the lower sectorial, and, finally, in the more complete reduction of the 
paraconid of m 3. In the John Day species, especially in C. geismarianus and C. 
latidens, the departure from the European type is even more marked. 
Measurements. 
No. 10193. | No. 10513. | No. 10939. | No. 11012. | No. 11382. | No. 11432. 
Upper dentition, length I1 to M 2... 0.044 0.044 | 0.0485 0.0435 
Upper canine, ant.-post. diameter............sseeeeeeeeees 005 005 005 -0045 
is «« transverse Mae roasts Se ste fesesevstee dente: 0035 .003 003 
Dee premolar series, lena this--c-esensebeese)le-ecerereseo== 025 | 923 025 
“¢ molar series, length 010, | ~— 010 O1L LOOM OLO -010 
aeeSPe lel erie tilivesscstyss-snsee cacatsseoveseeavepauesnersoscee: .0035 003 | .003 .003 
C8 IPB SFO capsdiaansoodsoscodcnsadsoncobsnsocHnsnoesnonnoce -005 .0045 2.004 | .0045 003 
SpTep svt) use Bae ales NES Toe Dery, 2 0055 005 | 0055 
CIP AL GB Aeaeesacancctcopercosesccbanonue sedabsdooonecee -010 |  -009 -009 .0095 | 0085 -009 
COL SETBIL STORE LN ec pO Eocene 006 | 2.004 .0055 | .005 
Sri Mp (og lerieet tio sstecet xeon sect cet tce,tace Se coco: 0065 | 007 .006 006 = —-.006 .006 
“« M1, breadth..... ae ccd| 00) | .008 008 
OE WB Ueya1N2550c 3:0ce odcccaauaneeouensocs! OsnaqoedaKeecos .0035 | .003 -004 004 -003 -003 
CC WEB Toren chD cocossosconcosocecosoabs sonopososacesabecadHe -006 -006 0055 | .004 -005 
Lower premolar series, length.....--- 02.00.00. +:11eeeeeeeeees | | 1021S eae OL9 
‘“« molar series, length... 017 ~+| ~ .016 017 -015 
4 SP evlenathvans tn. tac Sana ee enn | 003 | 003 | 
TBO NRCP ae oBS sec cooper RSE ee aE S005 gm en 005i ia 004: ~ | 
oC SI2Gy ete ei taie seteeisetetelentetseiseteetciseecicecissiemettcstetest -0055 -005 |  .006 -005 
OC aad colt: OC Sectodins SaQsos0Oc Uo oTOSHaSdCScosEC CaS BASOSONeCS -0065 -007 -006 | 0065 | .006 
PaREAMIV aT pactne: Kates Say eee Ni 010 | .0095 0095 | .010 | .009 
BO NED OG nance seocascacdoosbongaconoagsagsDasbAGECeGa5 005 -005 5005-00 | 0045 | 
«<M 2, breadth -003 | 003 .0035 | 
| 
A. P. S.—VOL. XIX. 2 U. 
