vi CONTENTS OF VOLUME XIX 



NUMBER III 



PAGE 



Certain Phases oe Glacial Erosion. Thomas C. Chamberlin and 



Rollin T. Chamberlin 193 



Valley Filling by Intermittent Streams. A. E. Parkins . . 217 

 Original Ice Structures Preserved in Unconsolidated Sands. 



Charles P. Berkey and Jesse E. Hyde . . . . . 223 



Restoration of Seymouria Baylorensis Broili, an American 



Colylosaur. S. W. Williston . . . . .232 



Geologic and Petrographic Notes on the Region about Caicara, 



Venezuela. T. A. Bendrat ....... 238 



T~te Age of the Type Exposures of the Lafayette Formation. 



Edward W. Berry ......... 249 



Tl -j Ripples of the Bedford and Berea Formations of Central ' 



and Southern Ohio, with Notes on the Paleogeography 



of That Epoch. Jesse E. Hyde : : . : . .257 

 A Possible Limiting Effect of Ground-Water upon Eolian 



Erosion. Joseph E. Pogue . . . -. . . . 270 

 Recently Discovered Hot Springs in Arkansas. A. H. Purdue 272 



Reviews 276 



Petrological Abstracts and Reviews . 283 



NUMBER IV 



Magmatic Differentiation in Hawaii. Reginald A. Daly . . 289 

 Petrographic Terms for Field Use. Albert Johannsen . . 317 



The Evolution of Limestone and Dolomite. I. Edward Steidt- 



mann . . . . . . . . . . -323 



The Recurrence of Tropidoleptus Carinatus in the Chemung 



Fauna of Virginia. E. M. Kindle ..... 346 



Further Data on the Stratigraphic Position of the Lance 



Formation ("Ceratops Beds"). F. H. Knowlton . . . 358 

 Large Glacial Bowlders. George D. Hubbard , . . -377 

 Reviews ........... 381 



NUMBER V 



Samuel Calvin. H. Foster Bain . . . . . . . 385 



The Evolution of Limestone and Dolomite. II. Edward Steidt- 



mann ........... 392 



