vi CONTENTS OF VOLUME XXIV 



PAGE 



The Origin of Red Beds. A Study of the Conditions of Origin 



OF THE PERMOCARBONIFEROUS AND TRIASSIC RED BEDS OF THE 



Western United States. Part II. C. W. Tomlinson . . 238 



The Acadian Triassic. Part III. Sidney Powers .... 254 

 The Lombard Overthrust and Related Geological Features. 



Winthrop P. Haynes 269 



The Skeleton of Trimerorhachis. S. W. Williston . . . . 291 



Reviews 298 



Recent Publications . . . 310 



NUMBER IV 



Note on the Linear Force of Growing Crystals. George F. 



Becker and Arthur L. Day 313 



The Classification of the Niagaran Formations of Western 



Ohio. Charles S. Prosser 334 



Origin of the Lyman Schists of New Hampshire. Frederic H. 



Lahee 366 



Notes on the Disintegration of Granite in Egypt. Donald C. 



Barton 3 8a 



A Recording Micrometer for Geometrical Rock Analysis. S. J. 



Shand 394 



Reviews 4°5 



Recent Publications 414 



NUMBER V 



The Geological Significance and Genetic Classification of 



Arkose Deposits. Donald C. Barton 417 



An Unusual Form of Volcanic Ejecta. Wallace E. Pratt . . 450 



Ripple-Marks in Ohio Limestones. Charles S. Prosser . . . 456 

 The Relationships of the Olentangy Shale and Associated 



Devonian Deposits of Northern Ohio. C. R. Stauffer . . 476 

 Evolution of the Basal Plates in Monocyclic Crinoidea camerata. 



I. Herrick E. Wilson .... 488 



Variations of Glaciers. XX. Harry Fielding Reid . . . . 511 



Reviews 5*5 



Recent Publications 5 J 9 



