JOURNAL 



OF 



MORPHOLOGY 



Founded by C. 0. Whitman- 



edited BY 

 J. S. KINGSLEY 



University of Illinois 

 Urbana, 111. 



WITH THE COLLABORATION OF 



Gary N. Calkins Edwin G. Conklin C. E. McClung 



Columbia University Princeton University University of Pennsylvania 



W. M. Wheeler William Patten 



Bussey Institution, Harvard University Dartmouth College 



VOLUME 28 

 1916-1917 



THE WISTAR INSTITUTE OF ANATOMY AND BIOLOGY 



PHILADELPHIA 



