EAR-SIZE 



11 



spread of the ears, i. e., the distance from ear-tip to ear-tip when the ears 

 are extended in a horizontal position and stretched slightly. Since the 

 measurements in nearly all cases were made by the same observer (Walter), 

 the personal equation is a fairly constant factor and may be disregarded 



Ear length 



in mm. / a 3 4 5 6 7 8 9 10 II 12 l^ 14- fS I6 I7 id 19 



' ' I I I ' I I I I » I I I I I I I 



120 



110- 



100 



SO- 



SO- 



70 



60- 



50- 



40 



30 



JL 



,0 



o_-a' 



0--0841 

 84-4 



y, •' 1 1 1 1 r 1 1 1 1 1 "I 1 1 I I I I I I 



Agem , 2 3 4 S 6 7 B S 10 II IZ 13 14 IS I6 I7 JQ 19 



weeks. 



Fig. I. Chart showing growth in ear-length, and body-weight of a litter of six short-eared 

 rabbits between the ages of two and eighteen weeks. See table i. 



Weight 



in 

 grams. 



■1500 

 ■1400 



1300 



1200 



1100 



1000 



Ysoo 



800 

 700 

 600 



\-500 

 400 



300 

 200 



100 



