

f 



Fig. 1 



Fig. 2 



Fig. 3 



Fig. 4 



» 





Fig. 5 



Fig. 6 



Fig. 7 



Fk.. S 



Fig. 9 





Fig. 10 



Fig. 11 



Fig. 12 Fig. 13 



Fig. 14 



L«, A 



Fig. 15 



Plate VIII. Ova from sterile matings as they appeared after being cul- 

 tured in vitro. (From the Proceedings of the Royal Society.) 



Recovered at 18 hrs. 



Recovered at 27 hrs. 



Recovered at 19 hrs. 



Recovered at 18 hrs. 



Recovered at 18 hrs. 



Recovered at 19 hrs. 

 Fig. 7, Recovered at 19 hrs. 

 Fig. 8, Recovered at 28 hrs. 

 Fig. 9, Recovered at 17 hrs. 

 Fig. 10, Recovered at 24 hrs. 



Fig. 1, 

 Fig. 2, 

 Fig. 3, 

 Fig. 4, 

 Fig. 5, 

 Fig. 6, 



30 mins. 



30 mins. 



5 mins. 



10 mins, 



15 mins 



5 mins. 



5 mins. 



35 mins. 



10 mins, 



45 mins. after sterile copulation cultured for 

 Fig. 11, Recovered at 37 hrs. after sterile copulation cultured for 6 hrs. Fig. 

 covered at 73 hrs. 40 mins. after sterile copulation cultured for 45 hrs. Fig. 

 covered at 73 hrs. 40 mins. after sterile copulation cultured for 45 hrs. Fig. 

 covered from the ovary, and cultured for 28 hrs. Fig. 15, Recovered at 

 30 mins. after sterile copulation cultured for 24 hrs. 



after sterile copulation cultured for 

 after sterile copulation cultured for 

 after sterile copulation cultured for 

 after sterile copulation cultured for 

 after sterile copulation cultured for 

 after sterile copulation cultured for 

 ^fter sterile copulation cultured for 

 after sterile copulation cultured for 

 after sterile copulation cultured for 



44 hrs. 

 25 hrs. 

 22 hrs. 

 17 hrs. 

 28 hrs. 

 22 hrs. 



22 hrs. 



23 hrs. 



23 hrs. 



24 hrs. 



12, Re- 



13, Re- 



14, Re- 

 48 hrs. 



103 



