CONTENTS 



1914-1915 



No. 1. NOVEMBER 



E. V. CowDRY. The comparative distribution of mitochondria in spinal 



ganglion cells of vertebrates. Fourteen figures (three plates) 1 



F. W. Thyng. The anatomy of a 17.8 mm. human embryo. Eight figures 31 



Robert Bennett Bean. The stature and the eruption of the permanent 

 teeth of American, German-American and Filippino children. Deduc- 

 tions from the measurements and examination of 1445 public school chil- 

 dren in Ann Arbor, Michigan, and 776 in Manila, P. I. Five diagrams 113 



No. 2. JANUARY 



Otto Frederic Kampmeier. On the origin of lymphatics in Bufo. Thirty- 

 five figures 161 



Henry K. Davis. A statistical study of the thoracic duct in man. Thirty- 

 two figures 211 



No. 3. MARCH 



Richard E. Scammon. The histogenesis of the selachian liver. Forty-five 

 figures (seven plates) 245 



J. A. Badertscher. The development of the thymus in the pig. I. Mor- 

 phogenesis. Twelve figures (two plates) 317 



Margaret Reed Lewis and Warren Harmon Lewis. Mitochondria (and 

 other cytoplasmic structures) in tissue cultures. Twenty-six figures . . 339 



No. 4. MAY 



Randolph West. The origin and early development of the posterior lymph 

 heart in the chick. Fourteen figures 403 



J. A. Badertscher. Development of the thymus in the pig. II. Histo- 

 genesis. Three plates (eight] figures) 437 



L. BoLK. On the premature obliteration of sutures in the human skull. . . . 495 



