388 NOTES ON THE CANID& OF THE WHITE RIVER OLIGOCENE. 
tively broader but more depressed than in Canis. As in Daphenus, the proximal articu- 
lar surface is somewhat more deeply concave and presents more obliquely toward the dor- 
sal side than in the recent genus. The distal trochlea likewise resembles that of Daphe- 
nus in having a deeper median groove and in being more confined to the palmar aspect 
of the bone than in Canis, which has the distal trochlea reflected well over upon the dor- 
sal side of the phalanx. 
Of the second phalanx only the proximal half is preserved in any of the specimens, 
and I have so far failed to find eyen a fragment of the distal end. So far as can be 
judged from the material at hand, Cynodictis would appear to have differed from Daphe- 
nus in the very important respect that the claws were not at all or only very imperfectly 
retractile. In Daphenus the asymmetry of the second phalanx is clearly displayed even 
in its proximal portion, while in Cynodictis the proximal end is quite symmetrical and 
does not possess any depression or excavation upon the ulnar side. However, a certain 
resemblance to Daphenus and difference from Canis may be observed in the greater con- 
cavity and more marked separation of the two pits into which the proximal facet is 
divided, as well as in the greater prominence of the beak-like process which rises from 
the dorsal margin and fits into the median distal groove of the first phalanx. In the 
absence of the distal end of the second phalanx, it cannot be positively stated that 
Cynodictis had lost (or had never possessed) all trace of the retractility of the claws, but 
it does not seem unlikely that such was the case. 
Measurements. 
| 
| No. 10493. | No. 11012, 
Carpus, height in median lime ......--..eeceeeeeseeeeeteneeecce cece eecec ee eereeneecesaaeeeseeceseasccesaeeceusesecen easene | 0.006 
GO” TODEYEtHN cocdoccdocsta0annancdanaosconoencmasos uahsea qs0Gbse05 shHeGHouno0 Sano GDADaEEbOsOUencdoDDOoNrO capcadavEG9NbaGoe | | O11 
Wigan 1, WEWGTYI cocccocospnseconsononaadaoonmncaooonaneanbadoceossosseCescocaysded09D05000030 Bee ea aconene Co eatrosct ad | | .012 
oe “ width of proximal end 0035 | 004 
Bap, GL Ae. CPMar Sia steinendy. Cees eon hte 2 hide... s OBE SCN ai Ahan, cd ee mene nmne ne | 2003 
Metucarpal ii, width of proximal end..........-. . cesseececeeeceseeeceeececeeeerceceeeceneesceeeceseesccceeeseeecesee: | .0035 
Metacarpall ii, Vength--.-.-------<nc-cesarereeee-eemseecccneecce=r set ea-raceee ene 2 Wiad ay EOE Re cea dees Be me 50220 .0215 
os ‘* width of proximal end... -004 | .0035 
fe G hs CEG bei Rall TS 116 scaRebnoddodo secre oonoccscrascaarcropbacactiosaradconadsvoasacadéc: sndonnqodbod nosdo soc | .005 | 0045 
Metacarpal iv, width of proximal end...........:-..cssc..ceeseecceecccsncececactersseerecseceneertceneesrcaeoserevecss | .004 | -0035 
Mietacanpallayamlen piney rseses eres =tee rer ee -1sliesty  aeeeileel ee eae eller eet leech teeters | -017 | 016 
S G6 Sychiln OF joRORMe)! GiMGl coosooconbocovoDooDoboDbongDeDoDosEHONDSOO HOSEN HeaCaDooO DAErieodaoNcaceAsasocORAAOAE 004 | 004 
eT WARE atcMUistall cenidee es Coke ae eck eens AEE ASE UTS by tee nat | 004 | 0045 
The ungual phalanx differs in several not unimportant details both from that of 
Daphenus and that of Canis, and is, on the whole, intermediate in character between 
