IV CONTENTS 



J. Parsons Schaeffer. Types of ostia nasolacrimalia in man and their genetic 



significance. Fifteen figures 183 



Frederick Tilxey. The development of the veins and 'ymphatics in 



Tragulus meminna, erxleben. Fourteen figures 193 



No. 3. JULY 



Fraxklix P. Mall. On the development of the human heart. Thirty- 

 seven figures 249 



Oswald S. Lowsley. The development o the human prostate gland with 

 reference to the development of other structures at the neck of the 

 urinary bladder. Eleven figures 299 



Eliot R. Clark. Further observations on living growing lymphatics: their 

 relation to the mesenchyme cells. Eighteen figures 347 



No. 4. SEPTEMBER 



Hal Dowxey. The attachment of muscles to the exoskeleton in the cray- 

 fish, and the structure of the crayfish epiderm Five figures 381 



Otto F. Kamp.meier. The development of the thoracic duct in the pig. 



Thirty-five figures (five colored plates) 401 



Frederic T. Lewis. The form of the stomach in human embryos with notes 



upon the nomenclature of the stomach. Twelve figures 477 



