vi CONTENTS OF VOLUME XXVI 
THE NORTHWARD EXTENSION OF THE PHYSIOGRAPHIC DIVISIONS OF THE 
Unitep States. II. W.N. Thayer . 
THE GEOLOGY OF THE KILDEER Mountains, NortH Dakota. ‘Terence 
T. Quirke 
PETROLOGICAL ABSTRACTS AND REvIEws. Albert Johannsen. 
REVIEWS 
NUMBER IV 
CoRAL REEFS AND SUBMARINE Banks. W. M. Davis 
PERMO-CARBONIFEROUS GLACIAL DEPOSITS OF SouTH AMERICA. A. P. 
Coleman 
THE SUBPROVINCIAL LIMITATIONS OF PRE-CAMBRIAN NOMENCLATURE IN 
THE ST. LAWRENCE Basin. M. E. Wilson 
CORRELATION OF THE EARLY SILURIAN ROCKS IN THE Hupson BAy 
Recion. T. E. Savage . 
NOTES ON SEDIMENTATION IN THE MACKENZIE RIVER Basin. E. M. 
Kindle 
NOTES ON THE MISSISSIPPIAN CHERT OF THE ST. Louts AREA. Donald 
C. Barton . 
EDITORIAL 
PETROLOGICAL ABSTRACTS AND REviEws. Albert Johannsen. 
RECENT PUBLICATIONS 
i NUMBER V 
as 
CoRAL REEFS AND SUBMARINE BAnkKs. W. M. Davis 
THE IRON-FORMATION ON BELCHER ISLANDS, Hupson BAy, WITH 
SPECIAL REFERENCE TO ITS ORIGIN AND Its ASsocIATED ALGAL 
LimesTones. E. S. Moore 
INTERNAL STRUCTURES OF IGNEOUS ROCKS; THEIR SIGNIFICANCE AND 
ORIGIN; WITH SPECIAL REFERENCE TO THE DULUTH GABBRO. 
Frank F. Grout 
THE HABITAT OF THE SAUROPOD Dinosaurs. Charles C. Mook 
PETROLOGICAL ABSTRACTS AND REvrews. Albert Johannsen. 
REVIEWS 
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SiS 
Sli 
