356 



THE AMERICAN NATURALIST 



[Vol. LVI 



in the corresponding horn of the uterus in all save six 

 cases. In five of these six instances there was one em- 

 bryo less in the horn of the uterus than there were 

 corpora lutea in the ovar>^ In the other case, the right 



TABLE II 



Right I Left Right Left 



horn showed 3 embryos although only two corpora lutea 

 of pregnancy were present in the ovary. Hence, in this 

 case, two embryos developed from a single ovum or a 

 single follicle contained two ova. In the instances where 

 there was one more corpus luteum than embryos it is 

 possible that another conceptus was present and became 



