fam st a oi Es Yad 
Bulletin of the Museum of Comparative Zodlogy 
AT HARVARD COLLEGE, 
Vou. LVI. No. 2: 
GEOLOGICAL SERIES, Vol. X. 
THE SQUANTUM TILLITE. 
By Rospert W. SAYLES. 
Wits TwetvE Puates. 
CAMBRIDGE, MASS., U.S. A. 
PRINTED FOR THE MUSEUM. 
JANUARY, 1914. 
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