JOURNAL 



OF 



MORPHOLOGY 



Founded by C. O. Whitman 



E. G. CONKLIX 



Princeton University 



C. A. KOFOID 



University of California 



G. A. Drew. 



Marine Biological Laboratory 

 Woods Hole, Mass. 



MANAGING EDITOR 



C. E. McCLUNG 



ASSOCIATE EDITORS 



M. F. GUTER 



University of Wisconsin 



F. R. LiLLIE 



University of Chicago 



H. V. Neal 



Tufts College 



W. M. Wheeler 



Bussey Institute, 

 Harvard University 



J. T. Patterson 



University of Texas 



L. L. Woodruff 



Yale University 



VOLUME 36 



DECEMBER, 1921, 



MARCH, JUNE, SEPTEMBER, 1922 



THE WISTAR INSTITUTE OF ANATOMY AND BIOLOGY 

 PHILADELPHIA 



