16 



BULLETIN 171, UNITED STATES NATIONAL MUSEUM 



The skull of Canis armbrusteri as indicated by specimens no. 11886 

 (fig, 2a and b), no. 11883 (fig. 3a, b, and c), and no. 11885 (fig, 4a, 6, 

 and c) approximates in size that of Canis occidentalis. Tbe rostrum 

 is slender, but the frontals are relatively broad and heavy. The 

 sagittal crest, though variable, is more prominent in no. 11886 and 

 no, 11883 than in old individuals of C. occidentalis. In no. 11886 the 

 inion projects backward to a marked degree, but not nearly so much as 

 in the Rancho La Brea wolves. 



The superior first three premolars are comparatively simple and 

 slender. The anterointernal portion of the posterior root of P^ and 

 P^ does not project lingually so much as in C. occidentalis. The upper 

 camassial and molar teeth are relatively large and massive. 



Table 3. — Measurements (in millimeters) of skulls and superior dentition of 



Canis armbrusteri 



Meusurement 



Skull 



Length from anterior end of premaxillary to condyles . 

 Length from anterior end of premaxillary to posterior 



aas-iA opening- 



Length from glenoid fossae to condyles 



Distance from line between postorbital processes to 



Jnion 



Width of muzzle in front of infraorbital foramina 



Least width between superior borders of orbits 



Width across postorbital processes of frontals 



Greatest width across zygomatic arches 



Width of palate between alveoli of M' 



Superior dentition 



lyength of cheek-tooth series, P' to M', inclusive 



C, anteroposterior diameter at base of enamel 



C, transverse diameter at base of enamel- 



P', anteroposterior diameter. 



P', greatest transverse diameter 



P', anteroposterior diameter 



P', greatest transverse diameter 



P', anteroposterior diameter.. 



P', greatest transverse diameter 



P*, anteroposterior diameter 



P*. greatest transverse diameter including protocone.. 



P*, transverse diameter across paracone... 



M', anteroposterior diameter parallel to outer wall 



M', transverse diameter perpendicular to outer wall.. 



M', greatest transverse diameter 



M', anteroposterior diameter . _ 



M', greatest transverse diameter 



U.S. 

 N.M. 



11886 



•270 



140 

 55 



135 

 151 

 156 

 '67.7 

 I 160 

 I 44.1 



1 101 



27.7 

 14.9 

 11.5 

 18.1 

 21.8 

 24.4 

 10.3 

 15.7 



U.S. 



N.M. 



1 101. 5 



14.4 

 5.8 



17.4 

 6.9 



28.8 



14.5 



12 



18 



22.5 



25.4 



10.3 



15 



US. 



N.M. 



no. 



11883 



1 130 



147 



62.6 

 167 

 1 150 

 >44.5 



96 

 13.3 

 9.3 



8.4 

 5.5 



I 18 



7 

 28.3 

 13.6 

 11.9 

 18.2 

 22.7 

 24.9 



9.5 

 15.7 



U.S. 



N.M. 



130 

 53.5 



1 120 

 145 

 44.7 

 61.5 



> 130 

 39 



8.6 

 4.5 



28.1 



14.5 



12 



18 



21.7 



24.5 



U.S. 



N.M. 



no. 



11887 



38.6 



17.5 



129.4 

 1 13.2 

 11.9 

 19.1 

 23.4 

 25.5 

 10.4 

 17.5 



U.S. 

 N.M. 



no. 

 7994 



36.5 



26.7 

 12.9 

 11.5 

 17.2 

 20.9 

 23.4 

 8.3 

 14.2 



Approximate. 



Two isolated upper molars of Canis armbrusteri were described 

 recently by Bryan Patterson (1932). He noted the large size of these 



