CONTENTS. 



PAGES. 



No. '_'. Description of two young twin human embryos with 17-19 paired somites. By 



James Crawford Watt (7 text figures and 4 plates) .V-44 



3. An anomaly of the thoracic duct with a bearing on the embryology of the lymphatic 



system. By Eliot R. Clark (3 figures) 45-54 



4. Fields, graphs, and other data on fetal growth. By A. W. Meyer (15 figures). . 55-68 



5. The corpus luteum of pregnancy, as it is in swine. By George W. Corner 



(3 plates) 69-94 



H. Transitory cavities in the corpus striatum of the human embryo. By Charles R. 



Essick (3 plates) 95-108 



3 



