758 INDEX TO VOLUME XXVIII 



Michelson, A. A. The Laws of Elastico- Viscous Flow. II . . . i8 

 Mollusca, Pleistocene, from Indiana and Ohio. By Frank Collins 



Baker 439 



Movements in Crystallizing Magma. By Frank F. Grout . . . 255 



New Mexico, Geological Setting of. By Charles Keyes .... 233 

 North America, Summaries of Pre-Cambrian Literature of. By 



Edward Steidtmann 558, 643, 743 



"Oil Accumulation, Notes on Principles of," by A. W. McCoy, A Dis- 

 cussion of. By Chester W. Washburne 366 



Oil Investigations in 1917 and 1918. Illinois Geological Survey, Bulletin 



49. Review by R. A. J 659 



Osbon, C. C. Peat in 1918. Review by E. S. B. . . . . . 277 



Paleozoic Diastrophics of the Northern Mexican Tableland. By 



Charles Keyes 75 



Pearce, J. Newton, George F. Kay and. The Origin of Gumbotil . 89 



Peat in 1918. By C. C. Osbon. Review by E. S. B 277 



Phytosaurian Reptiles, Preliminary Description of a New Suborder of, 

 with a Description of a New Species of Phytosaurus. By E. C. 



Case 524 



Planetary Nuclei, The Physical Phases of the. during Their Formative 



Stages. By T. C. ChamberHn 473 



Pleistocene Mollusca from Indiana and Ohio. By Frank ColUns Baker 439 

 Pleistocene Peneplain in the Coastal Plain, A. By H. F. Cleland . 702 

 Pre-Cambrian Formations of Northern Ontario and Quebec, A Correla- 

 tion of the. By H. C. Cooke 304 



Pre-Cambrian Literature of North America, Summaries of. By 



Edward Steidtmann 558, 643, 743 



Pre-Moenkopi (Pre-Permian ?) Unconformity of the Colorado Plateau, 



The. By C. L. Dake 61 



Quicksilver in 1918. By F. L. Ransome. Review by E. S. B. . . 276 

 Quirke, Terrence T. Concerning the Process of Thrust Faulting . 417 



Ransome, F. L. Quicksilver in 1918. Review by E. S. B. . . . 276 



Recent Publications 87, 182, 278, 374, 471, 660, 752 



Reply to Discussion by C. W. Washburne on "Notes on Principles of 



Oil Accumulation." By A. W. McCoy 37i 



Reviews 178, 268, 470, 659 



Savage, T. E., Tough, F. B., Williston, S. H., and. Experiments in 

 Water Control in the Flat Rock Pool, Crawford County. Review 

 byR. A. J 659 



Scheffel, Earl R. "Slides" in the Conemaugh Formation . . . 340 



