TABLE OF CONTENTS. 
LIST OF PUBLISHED PAPERS. 
PAGE 
Interrogative thought and the means of its expression, 
Edward T. Owen ; 353 
A Wisconsin group of German poets, Henry E. Legler, 471 
Some Hepaticae of the Apostle Islands, Charles E. Allen, 484 ^ 
Some points in the anatomy of Ranantra fusca (with three 
plates), . Wbi, S. Marshall and Henry Severin , 486 
Auditory memory-span for numbers in school children, 
John I. Jegi, 509 ^ 
A treatment of instant angular and linear velocities in com¬ 
plex mechanisms (with three plates), 
Oliver B. Zimmerman, 513 
A new Arrenurws (with one plate), . Ruth Marshall, 520 
The structure of the starch grain, . R. II. Denniston , 527 ^ 
The diurnal movement of plankton Crustacea, 
Chauncy Juday, 534 
Saskatchewan birds (with eight plates), 
Russell T. Congdon •, 569 
Variations in the distribution of the cat Fells domesticus 
(with one plate and two text figures), 17. S. Miller , 621" 
A study in the variations of proportions in bats, with brief 
notes on some of the species mentioned (with six 
plates), .... Ilenry L. Ward, 630 
On the conformal representation of plane curves, particu¬ 
larly for the cases p == 4, 5, and 6, 
Charlotte E. Pengra , 655 y 
