366 CHARLES IJ. STOCKAIJ1) AND A. L. JOHNSON 



pl. 73; fig. 8, pi. 75) shows the closest approach to the Peking- 

 ese coat pattern. The other animals all had moderately long- 

 hair. No. 1942 9 (fig. 5, pl. 73; fig. 1, pl. 75) gives the nearest 

 approach to the Saluki coat style. Only one of the eight 

 hybrids is long legged; the others are either intermediate 

 or fully short. 



A comparison of the profile views in plate 73 shows that 

 the head features of the F^ hybrids deviate from the Fj in 

 the direction of both parent stocks without completely ar- 

 riving at the patterns of either. Figure 5 has a somewhat 

 rounded cranial dome inherited from the Pekingese, but the 

 muzzle is quite long and slender as in the Saluki. The maxilla 

 is reduced more than the mandible which is almost fully 

 Saluki length and actually projects forward beyond the tip 

 of the nose. If the upper jaw in this animal had been long 

 enough to be in perfect agreement with the mandible, there 

 would have been a complete return to the Saluki muzzle. 

 This case illustrates the independence of the factors concerned 

 in the inheritance of form for each of the two jaws, and 

 also shows the inability of coordinating influences in growth 

 and development to adjust or smooth out the inherent dis- 

 harmonies between the jaws. Figures 6 to 8 show a more 

 fully expressed rounding of the cranial dome which gives 

 prominence to the forehead and emphasizes the depression 

 at the nasion, both of which are very definite Pekingese char- 

 acters. The muzzles in these three dogs are short and are 

 almost as wide as long; the upper and lower jaws are both 

 reduced to about the same extent, and there is fairly normal 

 dental occlusion. Figure 9 gives evidence of considerable 

 mixing of the two sets of parental characters. The cranial 

 dome and forehead are Pekingese, and had the face been 

 suppressed, the type would have been almost complete. The 

 upper jaw is very short and the nose slightly upturned, in- 

 dicating the presence of much of the factor complex for 

 the Pekingese face. However, the genetic factors for short 

 Pekingese mandible are not complete and the lower jaw is 



