190 Experinientti on tlif Rolifcr Hydatiiui 



These are the details of a siiiiilar experiment. A thelytukous 

 female was taken from XXXIV shown in the detailed test, which was 

 producing few arrhenotokous females. The results in the horse manure 

 solution were 115 thelytokous females and 5 arrhenotokous females. 

 The table shows the results of a thelytokous female in the green 

 protozoa culture. 



T T A 



I 



A A A ATT TTT A A A A A A A A A A A A 5 16 



A AT TTT AT T A A 6 5 



These experiments indicate that the increase in the numlier of 

 arrhenotokous females is due to the change from the horse manure 

 solution to the green protozoa culture and this is proved by subse(juent 

 experiments. It is to be noted that an increase takes place in the first 

 generation. 



Experiment II. A thelytokous femide not taken from a tested 

 family was jjut in the green protozoa culture. A thelytokous female 

 of the second generation was transferred to the horse manure solution 

 which was very concentrated and the protozoa of which wei'e very 

 numerous. The family was continued in this solution 



T in green protozoa food T A 



I 



T T A A T T AT AT AT T A A A A 



A A A A A *T T A A A A TAT 4 10 



,^, r^, 2' X T T T T T T T T T T T T T T T TTTTTTTTTTTTTTTTTT TTT 40 

 ,j, ,j, .J, j^X T T TT TT T T T T T T T T T T T T T T x T T T T T T T T T T T 37 



XT 2 



J - 



J, j,,j, X T T T T T T T x T T T T T T T T T T T T T T T T T TT T TT T T T T T 39 



rj, rj, j.'x X T T T T T T T T T T T T T T T T T T T T T T T T T T T T 33 



** The parents and many eggs in these two geneiatiuus were killed through being 

 exposed to the suns rays on a hot day. 



