Memoirs of the Museum of Comparative Zodlogy 
AT HARVARD COLLEGE. 
Vou. XLVII. No. 1. 
SEASONAL DEPOSITION IN AQUEO- 
GLACIAL SEDIMENTS. 
BY 
ROBERT W. SAYLES. 
WITH SIXTEEN PLATES. 
CAMBRIDGE, U. S. A.: 
Printed for the Museum. 
Fresruary, 1919. 
