FOSSIL VERTEBRATES FROM SAN PEDRO VALLEY—GAZIN 501 
Description.—The skull and jaw of Ganis edwardii (fig. 41) are 
intermediate in size between those of a gray wolf and of a coyote, 
about equaling specimens of the red wolf, Canis rufus, from Missouri 
and Arkansas. The skull is badly crushed, obscuring its form, par- 
ticularly in the cranial region. The jugal appears relatively ight and 
the rostrum somewhat shortened with the premolars more crowded 
than is usual in Canis rufus. The teeth are comparable in size to those 
in the red wolf and resemble them in structure more closely than they 
do those of any other species of canids. The deuterocone of the upper 
carnassial is distinctly developed as in Canis rufus. Also, as in Canis 
rufus the cusps of the lingual portion of M' are relatively well devel- 
oped, and the paracone and metacone less inflated than in Canis lupus. 
M?, though not so large relatively as is usual in Canis rufus, shows a 
well developed lingual portion with a prominent hypocone. The 
cingulum anterolingual to the protocone, however, is not so prominent 
in the fossil. 
The lower jaw is also relatively a little shortened and the premolars 
are in a closely continuous series. The cheek teeth appear relatively 
jarge in proportion to the size of the jaw when comparison is made 
with Canis rufus, and the distance between the molars and the condyle 
is appreciably shorter. The angle is larger and placed lower with 
respect to the condyle, whereas the coronoid is relatively small and 
with the angle projects backward more than in the red wolf specimens 
examined. 
Limb material that Gidley considered as associated with the skull. 
No. 12862, and on which he commented with respect to the presence 
of an entepicondylar foramen in the humerus (1922, p. 121), surely 
does not belong to a dog. The various elements are clearly felid in 
all respects. The association must have been quite accidental. 
Measurements in millimeters of upper and lower teeth of Canis edwardii (No. 12862) 
Measurement aeniltion | deneien 
Approximate length of dentition from I1 to M2_____________ 115 113 
Length of cheek teeth from Pl to M2__-_-___-__.________- oh 82 
Length ‘of premolars from P1 to’ P4.._ 22-22-2202 _-2sLiL. 60 47.5 
ieength of snolars from, Mil; to, M22 or ore te Sy 22.5 36 
AeTOPOSLeTIO’ Ginmeten OL bass. 2.0. 20. awe ae ee 15 13.5 
Prausverse diametertof Poe oO! i. SHU OR Mt are 6. 2 6. 0 
Anteroposterior diameter, of {P4s_.. 0%. 2th oe 24. 0 1504. 
MUTANS VETSe GIAMelLeM@hil ays aac De eee ences yee ih ei 4 14 
Anteroposterior diameter of M1__________________________ 14.5 25. 0 
rans verse diameperion Miles 7-62 2 tee Sir Be 20. 5 9.8 
Anteroposterior diameter of M2._____+____._.._-_________- 8. 4 bile 33 
‘BransVersesdiameten ‘or Mase Sik des ev, itd 12.8 8.5 
