BILATERAL TENDENCIES IN PYCNOPODIA HELIENTHOIDES. 239 



FIG. i. 



I 10" 



A 



RlllHTl 



JVC /?_F 4f Tiatt 



rir.ii 



C.I1K 



loo" 



90" 



80" 



jo" 



60" 



D 



B 



JL 



40" 



3" 



Oft 1 TRIALS 



5 10 15 20 25 30 35 40 45 50 55 



