THE AMERICAN JOURNAL 
OF 
ANATOMY 
EDITORIAL BOARD 
CHARLES R. BARDEEN, 
University of Wisconsin. 
HENRY H. DONALDSON, 
Wistar Institute of Anatomy. 
THOMAS DWIGHT, 
Harvard University. 
JOSEPH MARSHALL FLINT, 
University of California. 
SIMON H. GAGE, 
Cornell University. 
G. CARL HUBER, 
University of Michigan. 
GEORGE 8. HUNTINGTON, 
Columbia Univer sity. 
FRANKLIN P. MALL, 
Johns Hopkins University. 
J. PLAYFAIR McMURRICH, 
University of Michigan. 
CHARLES 8. MINOT, 
Harvard University. 
GEORGE A. PIERSOL, 
University of Pennsylvania. 
HENRY McE. KNOWER, SECRETARY, 
Johns Hopkins University. 
VOLUME V 
1906 
Vv 
THE AMERICAN JOURNAL OF ANATOMY 
BALTIMORE, MD., U. S. A. 
