20 



WEIGHT OF HIND LIMB IN GRAMS 



(one resistance to fehoral giwwth) 



.OOZ .018 .126 .ZIO ZSO 75 1.5 1.75 2jO 4.0 1J) 7.5 40 laO 11.0 IJ.O 240 270 28.0 i0.0 



3 4 5 6 7 8 9 10 11 U 13 14 15 16 17 13 19 ^0 



LENGTH OF EMBRYO IN CENTIMETERS 



113 



