Viii CONTENTS 
PAGE 
PArER No. I. An Early Ovum imbedded in the Decidua— Continued. 
The Age of the Ovum and Relation of Imbedding to Menstruation, 47 
Estimation of Age, ---------48 
Comparative Data, ---------50 
Comparison with other Cases, - - - - - - - 51 
Summary of Data regarding Selected Ova, 52 
Table of Selected Ova, - -- -- -- -59 
Table showing Periods of Fertilization and Imbedding, - - 60 
Relation of the Menstrual Cycle to Oestrus Cycle, 61 
Meaning of Menstruation, - -- -- --62 
Table of Menstrual Cycle, - -- -- --63 
Ovulation and Menstruation, ------- 64 
Nature of the Decidua, - - - - - - - - 65 
Paper No. II. An Early Ovarian Pregnancy, 67 
Introduction, ----------- 69 
History of the Case, - - - - - - - - _ 70 
Naked-eye Description of the Specimen, ------ 72 
Description of the Sections, - -- -- -- -74 
Discussion of Data, - - - - - - - - - §7 
Summary of some other Cases of Ovarian Pregnancy, - - 81 
Relations of Ovum to Lutein Tissue, ----- 85 
Origin of Lutein Cells in Human Subject, - - 85 
Process of Imbedding in Ovarian Pregnancy, - - - 87 
Origin of Plasmodium, -------- 89 
List of Works.Cited, ---------- 97 
