Bulletin of the Museum of Comparative Zoology 

 AT HARVARD COLLEGE. 



Vol. LVI. No. 2. 



GEOLOGICAL SERIES, Vol. X. 



THE SQUANTIIIVI TILTJTE. 



By Robert W. Sayles. 



With Twelve Plates. 



CAMBRIDGE, MASS., U. S. A. 



PRINTED FOR THE MUSEUM. 



Januabt, 1914. 



