114 CHARLES K. STOCKAKD 



ss for achondroplasic legs on Saluki typed bone in comparison 

 with a brother, 1439 c?, also homozygous but with modified 

 hound typed bone and much more shortened and deformed 

 legs. Figure 6 (pi. 10) shows animal 1440 6 , from which the 

 third leg skeleton in plate 25 was taken; this animal is inter- 

 mediate-short on impure Saluki typed bone. No. 1442 $ (fig. 

 7, pi. 10) is the donor of the fifth leg skeleton in plate 25; 

 he is diagnosed as homozygous for short on Saluki bone. 

 Figure 8 (pi. 10), 1439 5, has been described previously as 

 a grossly modified and divergent type. The leg skeleton of 

 this member of the litter is the only one not pictured in 

 plate 25, since he was being retained for further study in 

 life when his six litter mates were autopsied. Figure 9, plate 

 10, 1443 $ , is clearly seen to be intermediate for short legs 

 on Saluki typed bone ; its front leg skeleton is second in 

 plate 25. This animal is almost indistinguishable from mem- 

 bers of the F x generation. The only long legged dog of the 

 litter is 1444 5 (fig. 10, pi. 10) ; his long leg skeleton is first 

 in plate 25. This dog is almost pure Saluki in bone type, 

 as the leg skeleton quite definitely indicates and as one couid 

 readily recognize from observation during life. The only 

 female in the litter, 1445 9 , is shown as figure 11 in plate 10 

 and in larger view in plate 11 (right in fig. 3) by the side of 

 her long legged brother. This bitch is a perfect example of 

 the homozygous expression for achondroplasia of the extremi- 

 ties in an almost purely developed Saluki type. The front 

 leg skeleton of this animal is at the right in plate 25. 



The examinations and measurements made on the living- 

 animals of this litter, as well as the large total number of Fo 

 bassethound-Saluki hybrids, show the Saluki type, as a physi 

 cal complex, to be largely dominant in its inheritance over 

 the bassethound type. The photographs of the ¥ x and F 2 

 hybrids in plates 10, 11 and 12 clearly illustrate this fact 

 to anyone having some knowledge of dog breeds. In the 

 above statement we are, of course, excluding the achondro- 

 plasic leg inheritance from the composite breed constitution 

 or type. 



