286 ME. C. C. HURST: EXPEEIMENTAL STUDIES 



25 are Belgian Hares, No. 47 is a Silver Fawn, Nos. 51 and 52 

 are Dutch, No. 61 is a Himalayan, and Nos. 2, 3, 23, and 50 are 

 Angoras. 



Table 1. 



Shorts X Angoras (F^). 



Short. Angora. 



SI xA2 26 



AS xS4 16 



A 3 X S 51 8 



S 18 X A 2 4 



A 23 X S 25 13 



A 23 X S 61 7 



A 60 X S 47 8 



S 52 X A 2 5 



Total 87 



(b) Second Generation (F^). 



The short-coated hybrids of the first generation bred together 

 produced a mixture of shorts and Angoras in Mendelian 

 proportions, 7 short-coated hybrids bred together produced 

 171 young, of which 70 were reared to the age of two months or 

 more, when the nature of the coat became evident; of these, 53 

 had short coats and 17 were Angoras. 



The Mendelian expectation for 68 young is 51 shorts and 

 17 Angoras. 



The Angora coats of the second generation were indis- 

 tinguishable from those of pure-bred Angoras of the same age. 



The short coats of the second generation were similar in 

 appearance to those of the pure and hybrid shorts. 



Each individual hybrid of the first generation that was tested 

 produced both kinds of coat, usually in the same litter. 



The individual results were as follows :— -No. 5 gave 6 shorts 

 and 3 Angoras ; No. 7, 8 S and 3 A ; No. 8, 2 S and 2 A ; No. 9, 

 24 S and 5 A ; No. 10, 37 S and 11 A ; No. 11, 13 S and 4 A ; 

 No. 12, 16 S and 6 A. 



The following table gives the individual matings with the 

 details of each litter. H = hybrid of the first generation bred 

 from S X A. 



