Volume XIII 



Number i 



THE 



Journal of Geology 



A Semi- Quarterly Hagazine of Geology and 

 Related Sciences 



JANUARY-FEBRUARY, igo 5 



EDITORS 



T. C. CHAMBE*RLIN, in General Charge 



R. D. SALISBURY R. A. F. PENROSE, Jr. 



Geographic Geology Economic Geology 



J. P. IDDINGS C. R. VAN HISE 



Petrology Structural Geology 



STUART WELLER W. H. HOLMES 



Paleontologic Geology Anthropic Geology 



S. W. WILLISTON, Vertebrate Paleontology 



