72 CHARLES K. STOCKARD 



of cliondrodystrophy, and if so, will it be affected to the same 

 degree as is the shepherd bone? The fact that achondroplasia 

 of the extremities in the bassethound-shepherd cross is in- 

 herited as a single factor dominant character over normal leg- 

 growth need not necessarily mean that this condition is domi- 

 nant for all crosses nor that all types of bone will be suscep- 

 tible to such growth reactions. The investigation of such 

 growth distortions must be made on many different breeds 

 and must be extended to other degrees and forms of distorted 

 expression in order to fully analyze these problems. 



The F l bassethoitnd-Saliiki hybrids. A tested pure basset- 

 hound bitch, " Paula" 277$, was crossed w r ith a perfectly 

 typed Saluki male, 323 $ . This male was the offspring of a 

 pair of highly prized Salukis imported from Egypt by Mr. 

 Erastus T. Tefft. Five F a hybrids, three males and two 

 females, were whelped from the cross-mating and all lived 

 to maturity. 



Two F! bassethound-Salukis are shown in plate 10 (figs. 

 3 and 4) and in somewhat less reduced photographs in plate 

 11 (figs. 1 and 2). All the F x hybrids are almost exactly the 

 same in form and behavior, and this uniformity is in itself 

 indicative of the purity or genetic homozygosity of each of 

 the parent stocks. These hybrids have a slenderer and seem- 

 ingly longer head than the bassethound and show the peculiar 

 almond shaped and obliquely slit Mongol-like eyelid openings 

 of the Saluki. The Saluki (fig. 1) and F, (fig. 3) in plate 10 

 show this characteristic eye, and in figures 2 and 3 of plate 11 



PLATE 10 



EXPLANATION OF FIGURES 



Cross between the long, slender legged Saluki and the achondroplasic basset - 

 hound to determine whether the hybrid reaction for leg type follows the same 

 pattern in this cross as in the shepherd-bassethound cross. 



1 Saluki 323^. 



2 Bassethound 220 <?. 



3 F, hybrid 505^. 



4 F, hybrid 504^. 



5-11 Seven members of one litter of F 2 hybrids. 



5 1441 c?. 6 1440^. 7 1442^. 8 1439^. 9 1443^. 

 10 1444 c?. 11 1445$. 



