CONTENTS OF VOLUME XIII vil 



NUMBER V 



PAGE 



The Geographical Cycle in an Arid Climate. W. M. Davis - - 381 



Note on Baked Clays and Natural Slags in Eastern Wyoming. 



E. S. Bastin ----- 408 



The Delaware Limestone. Charles S. Prosser 413 



Megacerops Tyleri, a New Species of Titanothere from the Bad 



Lands of South Dakota. Richard S. Lull 443 



Comment on the "Report of the Special Committee on the Lake 



Superior Region." Alfred C. Lane - - - - - -457 



Reviews: Geosynclinaux et regions a, tremblements de terre, F. de Mon- 

 tessus de Ballore (J. C. Branner), 462; Grundzuge der Gestein- 

 skunde, Ernst Weinschenk (E. S. B.), 464. 



Recent Publications ---------- 466 



NUMBER VI 



The Mineral Matter of the Sea, with some Speculations as to 

 the Changes which Have Been Involved in its Production. 

 Rollin D. Salisbury --------- 460. 



The Classification of Igneous Intrusive Bodies. Reginald A. Daly 485 



Glauconite. J. K. Prather -------- 509 



The Mesozoic of Southwestern Oregon. George Davis Louderback 514 



Arapahoe Glacier in 1905. Junius Henderson ----- 556 



Papers Read at the Summer Meeting of Section E, American Asso- 

 ciation for the Advancement of Science, at Syracuse, N. Y., 

 July 19-22 --------- - 557 



Recent Publications ---------- 558 



NUMBER VII 



Ferdinand, Freiherr Von Richthofen. Bailey Willis - - - 561 

 Structure and Relationships of American Labyrinthodontidae. 



E. B. Branson ---------- 568 



Recent Geology of Spitzbergen. John J. Stevenson - - - 611 



The Northern and Southern Kinderhook Faunas. Stuart Weller 617 



The Development of Scaphites. W. D. Smith - 635 



Recent Publications 655 



