Page 
A Study of Retarded Children in a Group of North-West¬ 
ern School Systems - - Freeman A. Lurton, 275 
Officinal Pastorum: A Study of the Dramatic Developments 
within Liturgy of Christmas - Karl Young, 299 
The Regulations of the University of Wittenberg, 1546 
. Ernst Voss, 397 
A Biological and Statistical Analysis of the Vegetation of 
a Typical Wild Hay Meadow (With Plates XVIII- 
XXIII) - Arlow B. Stout, 405 
The Pholiota of the Region of the Great Lakes (With 
Plates XXIV-LV) - - Edward T. Harper, 470 
The Walden Inversion - - Andrew F. McLeod, 503 
The Chemistry of Boron and some new Organo-Boron 
Compounds - Arden R. Johnson, 528 
A Study of the Light Reactions of Philobolus (With 19 
Tables and 21 Figures) 
Ruth F . Allen and Hally D. M. Jolivette, 533 
The Cytology of the Convallariaceae (With Plates LVI- 
LVIII) - - - Frederick McAllister, 599 
Browning’s Idealism - - - J. W. Cunliffe, 661 
The Last Will and Testament as a Form of Literature 
.- - Eber G. Perrow, 682 
Note : The Index of this Part of Volume XVII will be found 
at the end of Part II. A single index will comprise the whole 
volume. 
