VOL, VIII. JULY-SEPTEMBER, 1922 NOS. 4,5 
american MIDLAND 
NATURALIST 
Devoted to Natural History, Primarily 
that of the Prairie States 
Published by the University of Notre Dame, 
Notre Dame, Indiana 
j. A. NIEUWLAND, C.S.C., Ph. D., Sc. D., Editor 
CONTENTS 
The Histological Structure of the Gills of the Najades, with 
Special Reference to the Histology of the Groove Along 
the Edge of the Inner Gill. Hiram J. Bush 89 
Notes on Alabama Plants. W. Wolf, O. S. B. 104 
Book Reviews. Carroll Lane Fenton 127 
PRICE $1.50 A YEAR SINGLE NUMBERS 30 CENTS 
FOREIGN, 6s. 6d. 
Entered as second-class matter at Notre Dame, Indiana. Acceptance for mailing at special 
rate of postage provided for in section 1103, Act of October 3, 1917, 
authorized on July 3, 1918. 
THE UNIVERSITY PRESS, NOTRE DAME, INDIANA 
