CONTRIBUTIONS TO EMBRYOLOGY, NO. 2. 



DESCRIPTION OF TWO YOUNG TWIN HUMAN EMBRYOS 

 WITH 17-19 PAIRED SOMITES. 



By James Crawford Watt, B. A., M. B. 

 Lecturer in Anatomy and in Topographical Anatomy, at tin- University of Toronto. 



With 7 text figures and 4 plates. 



