246 CHARLES R. STOCKARD AND A. L. JOHNSON 



of the dachshund. A very strange and unusual appearance 

 is produced by carrying the large ears of the dachshund in 

 this erect Boston terrier manner. The body of the animal 

 is long and the legs are short and achondroplasic as in the 

 dachshund, yet the tail is short and much bent and the coat 

 color is brindle with a white chest and chin as in the Boston 

 terrier. This animal was a medley of strange combinations, 

 yet a very pugnacious individual, easily dominating all other 

 members of his litter. 



The same animal, standing between a litter brother and 

 sister, is shown photographed from life in plate 44 (fig. 2). 

 Immediately below (fig. 4) is a photograph of the mounted 

 specimen, and it is readily seen that the excellent mount in 

 no way distorts the features of the living animal. Nine dif- 

 ferent backcross individuals showing a wide range of charac- 

 ter differences are illustrated in plate 44. A great variation 

 in size and type is found among them. 



The backcross of the F x on the dachshund parent stock- 

 does not give nearly so wide a variety in form as when the 

 cross is made on the Boston terrier. Plate 45 contains photo- 

 graphs of five backcross hybrids from two litters whelped 

 by dachshund mothers. The bodies, legs and tails all closely 

 resemble those of the dachshund, while white hair spots on 

 some of the chests are reminiscent of the Boston terrier color 

 pattern. All the heads approach the dachshund in general 

 form. The ears are large and drooped, although in some 

 animals they may be partially raised and on the whole can 

 be more easily lifted and moved than is possible in the pure 

 dachshund. The face in the backcross hybrid is long, the 

 depression at the nasion mild and the forehead lowered, all 

 in dachshund manner. 



This survey of the general appearance of the living animals 

 in the several filial generations and backcrosses and the 

 examination of the general skull characteristics in the hybrids 

 have prepared the way for a more exact and detailed con- 

 sideration of the inheritance and development of the indi- 

 vidual characters in the hybrid skulls. It is on the basis of 



